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The Linux Foundation announced that the Intel-backed Yocto align project developed open source tools for Linux based embedded systems, and technology merged with the open Embedded Community known for its Linux build system. The Linux lobby organization announced new partner in the Yocto project, including the major embedded Linux semiconductor manufacturers and software development companies.
Read more at LinuxDevices
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Simple RoundCube (over SSL) and Webmin with fail2ban for ISPConfig 3 on Debian squeeze
I prefer the RoundCube key of the default setting in ISPConfig 3. I find it useful, the Webmin installed my systems in all. In this post, you see installed a very quick way, both, in companion with great support of fail2ban. Finally I all of you access to over SSL (see also phpMyAdmin - the top at the end).
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Upstart 1.0, that event-based replacement for the traditional init daemon, claims the stability of end users expected to deliver
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At last to the end of this series, we and all the pieces come together, and make work our fabulous unattended automatic backup schema. You must never raise a finger except run regular checks to ensure that everything works correctly.
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The last two parts of this series are here at last. Today we learn how we say rsync which files include or exclude, set up passwordless login on the backup server and test everything safely.
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Scrivener is a tool for the breakdown, storyboards, writing and editing of longer form write - think books, long reports, film scripts and so on. Scrivener began as an app for Mac OS X, but it has a steady stream of users who have asked the company to produce a Windows and/or Linux version. Turns out, the company has listened and is working on a beta version for Linux and it's pretty good looking.
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Such as switching to multi-core-so also the need for parallel programming, but let us speed up look at what caused this trend.
Read more at Linux Magazine
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After moved it from X.org server 1.10 in the last minute, the X.org developers take a different view on RandR 1.4, the X resize, rotate and mirror extension
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VirtualBox, the Sun/Oracle virtualization platform, has supported OpenGL acceleration and Direct3D acceleration within virtual machines for more than two years. If the host system hardware GPU acceleration, OpenGL/Direct3D calls can be passed by the guest to the host at the VirtualBox guest driver is installed. It has the Linux 3D support VirtualBox 2.2 and it was at first limited to support OpenGL 1.4 - and in the summer of 2009 turned OpenGL 2.0. We had not all early benchmarks as was the initial support to buggy, but even with the recently released VirtualBox 4.0, and stable for the most part while the support is available, it is still far from very efficient and are delivered to crash under some OpenGL software.
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To reassure users worried about the threat to Qt from Nokia, Windows Mobile, President of the KDE, Cornelius Schumacher, declare written a blog post has the KDE development continues on the basis of Qt,
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Also in the reflected light from the impressive new dual-core dual camera says IOS 2, the Android 3.0-driven Motorola Xoom Tablet holds its own, this eWEEK review. Although the price is steep and optimized apps are hard to get, the Xoom's help Tote multitasking, a smooth surface of the honeycomb, well-made cameras, long service life of the battery and an impending 4 G upgrade the Tablet make a winner....
Read more at LinuxDevices
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This tutorial describes how you can set up a development environment for building Android applications on a Debian squeeze desktop with Eclipse, Android SDK, and PhoneGap. Device tested describe how to build Android apps from the command line with the PhoneGap and the GUI with Eclipse and PhoneGap and how in an Android emulator and a real Android. PhoneGap, you can use your Android applications with Web technologies such as HTML, to develop CSS and JavaScript (e.g. with JavaScript libraries such as jQuery/Keds) and it is these Web apps in native Android apps (in fact, PhoneGap supports multiple platforms such as such as AndroidiPhone), Palm, Windows Mobile, Symbian, so that you can use the same sources to create apps for multiple platforms).
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Greg Kroah-Hartman has announced the release of 2.6.32.31 due to a build problem with 2.6.32.30. "it contains only a patch, a revert of a patch, which broke the build on a range of systems and should never have been included in the 32 structure." This was my fault, I had it back in my local development machine, but forgot that it up to my laptop synchronization, which I took with me this week while traveling to a Linux Foundation Conference, where I have the final version. "
Read more at LWN
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Wind River extends its on board program that offers Linux Board vendors and test VxWorks software tools, documentation and training you need to develop, and validate embedded development kits. The program more diversified now allows providers, the Wind River test management-based BSP validation House, among other benefits bring, the Intel subsidiary says....
Read more at LinuxDevices
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It took almost a year around here. The first tablet since the original iPad matter. The Xoom is the first real Android tablet. It came before the IOS 2 by a hair. There in the "year of the iPad 2," as Apple put it lives, it seemed that only fitting to wait, drop had seen everything to judgment until we iPad 2 had to offer. Frankly, there is no way that all life could the Xoom until too, that must be it. It is also not really done. It has problems. But it's still very good. It is the first non-iPad Tablet worth buying.
Read more at Gizmodo
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Novell is using the open-source technology from rival Linux vendor Red Hat, Red Hat help users to SUSE Linux migrate.
Read more at LinuxPlanet
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Since its beginnings as a Microsoft Exchange alternative for small, medium-sized businessed, the Open-Xchange collaboration suite has stretched a bit beyond just a messaging solution. The flagship product, open-xchange server is a complete collaborative platform, in particular with the addition of the InfoStore-document-sharing module. Here is how to install Open-Xchange server, on the way to replace Exchange.
Open-xchange is a multimedia tidal of flavors. It is, of course, the stand-alone Server-Edition, as also the hosting Edition, which provides open-xchange users as a Web app. The Advanced Server Edition features the same Web based user interface in the hosting Edition, but ensures content in a similar way as the Server Edition. The Open-Xchange appliance Edition also used the Web based GUI, and acts as a completely stand-alone appliance with a wizard-based interface to get started.
In this article we'll go old-school and go by setting the Server Edition (SE) on a Debian (lenny).
In addition to Debian GNU/Linux is open-xchange SE optimized on SUSE Linux Enterprise Server 10 and Red Hat Enterprise Linux 5 run. Additional software requirements include a MySQL database, Oracle Java VM 1.5 and an IMAP server such as Cyrus, courier, Dovecot, UW-IMAP. Finding all of these pieces is delivered Open-Xchange SE not difficult, as you with the SE package. But you need to know how you all these services, which requires a fair amount of expertise, because no GUI configuration tools for the Server Edition to configure it.
In particular, 6.18, as well as the basic configuration steps will demonstrate in this article to set up open-xchange SE. This is a single-server installation, without any distributed or clustering features of the ausgebrachtes product involved. All you need is a Debian Lenny installation and a working Internet connection.
The easiest way to open-xchange SE install on Debian, that add Open-Xchange-repository to the repository list and allow Debian Package Manager the heavy lifting.
Start to start the Terminal application to your favorite editor, that of the Open-Xchange software repository information file sources.list add Debian repository be changed.
$ Sudo gedit /etc/apt/sources.list
Add at the end of the file:
Deb http://software.open-xchange.com/OX6/6.18/DebianLenny/ /
In addition, you must also Sun Java and so should the Debian-non-free repository add/if you select is not already in the sources.list file:
Deb http://mirrors.kernel.org/debian/ lenny of main not Freedeb src http://mirrors.kernel.org/debian/ lenny of main not Freedeb http://security.debian.org/ lenny/updates of main non-Freedeb-src http://security.debian.org/ lenny / updates main non-free
Download the package index with the next command. This will download the package descriptions available in the software repositories:
$ Sudo apt-get update
Because Open-Xchange starts with meta packages after version 6.16, much can give you a command to the downloading and installing all necessary packages of an open-xchange deployment on a single server start pretty:
$ Sudo apt-get install MySQL-Server Open-Xchange-meta-single server Open-Xchange authentication database open-xchange-Spamhandler-default
Usually automatically runs the installation process, but you have to allow to see the Sun JRE packages. If you want to manage only your Open-Xchange installation of database and should not project to integrate, such as with LDAP and open-XchangeLDAPSync, you also install the package of Open-Xchange-meta-Databaseonly.
You can still individually install the individual packages if you need to select a specific set of functionality that you want to have. No matter what sure to install the MySQL-Server package together with the (meta) packages that you use for your installation.
If you installed the packages, it is time to configure the system. There are three levels of administration that require different credentials at some point during the installation and configuration of the server. The provided passwords are weak and replaced by stronger passwords need to be.
The MySQL database useranwendername: open exchange password made available: Db_passwordThe Open-Xchange admin master
User name: OxadminmasterPassword provided: Admin_master_passwordThe context Admin
User name: OxadminPassword provided: Admin_passwordTo set up open-xchange SE, it is imperative, for the database are running:
$ /etc/init.d/mysql start
It is also a good idea is there, the Open-Xchange binaries to your $PATH add:
Echo $ PATH
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Formally, two large embedded Linux projects was their efforts this week, a move that simplifies the landscape for device and embedded software developers. Yocto, a Linux Foundation LF stewarded project that created development tools, and OpenEmbedded, a community driven distribution build system, their "alignment" announced, on March 1st. The merger includes governance changes and new corporate collaborators, but for the average Linux developers, the main effect is an optimized embedded development process.
Yocto started in October 2010, with the aim of simplifying the build process for teams working on embedded Linux systems. "Embedded" systems in Yocto's context refers to computing environments without a traditional computer interface, and perhaps no GUI at all. It includes router, NAS devices, and other stationary platforms that provide a Web front end management, but also extremely small, single-purpose devices, little more than boat to do that and run from flash memory. In any case the memory, processing power and memory available are typically very small - rare of a few megabytes to even the high-end router - and almost always on non - X 86 CPU architectures built.
This class of device is very different from the portable GUI based platform for consumer electronics specifically from MeeGo, where today's mobile phones almost all resources found offer on desktops and notebooks from a few years ago. Building "true" embedded Linux products requires a cross-compilation environment and the distribution build system that can target very specific device specifications. Yocto tries to simplify by plug-ins for large host IDEs such as Eclipse and Anjuta, plus much-needed missing pieces such as a fakeroot-like utility called pseudo, one cross-Prelinker, and a suite of tests and quality assurance process tools.
First embedded Yocto build system that allows developers, worked on the tiny cross-distro compile a whole, quickly and guarantees in terms of stability. But poky itself shares many of the goals of OpenEmbedded although OpenEmbedded is not only limited to building embedded Linux, and the two projects have long retained compatibility. When Yocto was announced for the first time, there therefore questions were whether it started with the older and well established OpenEmbedded or completed it.
So, this week's announcement not officially two projects, align the similar goals amount to a significant shift in the underlying technology, but it. As one of the fusion supports now Yocto a "OpenEmbedded core", the basis for building an embedded Linux distribution can serve as. The OpenEmbedded core consists of base-layer recipes and files to the developer, other components, including other Yocto utilities, hardware-specific drivers and user-defined or application code would stack.
The two projects strictly define the core, to resolve one of the original criticism of OpenEmbedded-, that unnecessarily many components contain his width design for true embedded products, to complicate adding development time and QA.
Together with the technical adoption of OpenEmbedded core fusion OpenEmbedded project adds representatives in the Yocto governance Board, to ensure that the two projects work together continue smoothly. The Linux Foundation also announced that the commercial companies officially combined a slate his support after the effort, including Cavium Networks, Dell, Freescale Semiconductor, Intel, LSI, Mentor Graphics, Mindspeed, MontaVista Software, NetLogic Microsystems, Texas instruments, Tilera, Timesys and Wind River throw was.
With more support the Yocto is far less likely as "Challenge" to OpenEmbedded are perceived, and to increase the ugly Specter of fragmentation. The definierteren OpenEmbedded core system providers are building devices with OpenEmbedded access to Yocto tool-set and Yocto developers who offered an additional set of options for the extension of your system, poky.
Ultimately, the type of the embedded devices where Yocto and OpenEmbedded make their strongest result, are those where the vast majority of consumers is never aware of, which is - running on the inside, and where you should not have to care. But that's exactly, why Linux is the dominant player on these devices: it is customizable and solid enough that the owner simply flip the power switch and runs it. But historically it adapt to the specifics was not easy to Linux each particular embedded hardware device. Yocto not yet developing for these systems trivial, but it is a big step in the right direction, and code-sharing with OpenEmbedded only makes things easier.
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Node.js had a very active week. Joyent has relaunched its hosting service Node.js and O'Reilly Media posted a book project Up and Running with Node.js Tom Hughes-Croucher.
Node.js was also the star of a long piece in the registry and withdrew before Clojure in Google Trends this week. On top of all, all, Travis Glines gave us an idea of what sites construction with it really is.
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Presentations can be your best friend or your enemy. You can make or break a meet. You can immediately be memorable or forgotten. Most users cobbled together the default presentation with little to no pizazz and hope that the content will be enough to keep everyone's attention. In a perfect world that would work. But in our imperfect world average man needs a little something extra to keep the attention of the audience.
LibreOffice impress has spice up what you need to help your presentations, beyond standard slide transitions. LibreOffice impress graphics make you mobile on your slides, move to draw focus on weight, or just to impress. This feature is built and not terribly difficult to achieve.
The stepsEach of these steps discussed briefly. But the basic steps that are creating mobile graphics:
Create your PresentationAdd the graphic to used in the PresentationPlace custom animations, select the picture at its starting point PointUnder one three options to create the graphic's path of the first.Draw the object path, and double-click on the very endpoint of the path. Select the Bewegungsgeschwindigkeit.Die show presentation.That's it. Now, we take a closer look at steps one by one.
Step 1: Getting startedI go into creating a new presentation. You should already know, create a presentation and have some idea how impress used. But you must either have started, open your presentation or an existing presentation, add a picture with a slide.
Step 2: Add the graphics be usedNow you must add the slide image (which will be mobile). This image needs to be small enough so that enough movement can occur. If you select an image too large, you will receive not nearly enough exercise, be noticeable.
Click the image to add insert-> picture-> from file. Navigate in the window where you have saved the image, select the image, and then either double-click on the image or select the image and click Open.
Put the picture at its starting pointYour moving image moves along a specified path (of your design). This path will have a start and end. You need to move the image to the position on the slide in the movement to start path. Keep in mind consider the remaining elements that will fill the slide.
Move the image simply click and drag on the motion path to begin. You are now ready to create the motion path.
Step 3: Select the movement type pathWhat we do here is under the tab "custom animation", choose movement type a path. Must click first on your image (select it), that allow you to change the effect. In the right pane (see Figure 1) on the button Add.
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Augmented Reality (AR) is one of those nebulous computing terms that can mean entirely different things to any two vendors. AR covers everything from games to computer vision to mash-ups of Web services — but the most useful applications are those mobile browsers that grab your current location and overlay relevant information about the things around you. Layar, Google Goggles, and Wikitude, for example, can place photos, Web pages, or a multitude of other information about your surroundings right at your fingertips. But if you care about open source, have no fear: there are plenty of alternatives to the proprietary AR app vendors. Let's look at what they offer, where they differ from proprietary AR, and where the field seems to be going.
Android users have the rosiest view of the AR landscape. The open source applications closest in usage to the commercial AR browsers are Mixare, AugmentThis, and ARviewer. All are available as stand-alone apps from the Android Market, or from their individual project sites — and each can be used as an engine on which other apps are built.
Several of the AR browser projects for Android make the same split effort — there is a browser app, plus a framework to build other browser apps and add or edit your own AR content. The down side is that none of them spends as much effort building up a large library of default data sources. The Mixare App displays Wikipedia points of interest (POIs) by default, but it offers instructions on how you can tailor it to display your own data sources. At the moment, the Mixare site lists three derivative apps, all of which are tailored to specific regions in Europe. However, you can also use the Mixare browser to access other data sources on a link-by-link basis. The Display Your Own Data instructions outline how this works; you simply pass a JSON-formatted request to the browser that includes both the URL of the data you want to tag, and its geolocation. Mixare uses the phone's camera to overlay linked images on a "heads-up" style video display, which is the most popular AR interface.
AugmentThis is more explicitly about contributing your own data — kind of like a Wiki-AR-database. You can create geo-tagged data files in KML (using Google Earth or any other KML-compatible application) and upload them to the AugmentThis site. Then you can access your own private geodata in the mobile browser, plus the full library of publicly-contributed geodata POIs. AugmentThis can display either a 2-D map view or a "heads-up" display with waypoints and POIs overlayed over the camera feed.
Naturally, there is no shortage of opinion as to which approach is better, but unless you have a fast processor in your device, many user reports indicate that the 2-D map views show you your surroundings better, because you don't have to turn and pan the phone to see the tagged objects outside the camera's field-of-vision. Since most high-end Android devices have a digital compass, they can correctly detect orientation, and re-orient the map view even in 2-D. AugmentThis takes advantage of this feature if your hardware supports it.
The third option, ARviewer, is based on the LibreGeoSocial framework, and the version in the Android market is essentially a demo. But, if you're so inclined, you can tag and contribute your own content as well. ARviewer and LibreGeoSocial fall short of the competition when it comes to documentation, however, so until that situation improves, you'll find it much easier to get started with the others.
There is yet a fourth Android-powered solution, OpenAR, although right now you must request a token from the project before you can use the mobile app to tag locations and upload information. OpenAR seems targeted more at individual contributions than the other projects, offering no list of public data sources (even from free sites like Wikipedia). It is probably a project to watch for the future.
Believe it or not, the locked-down iPhone platform actually has one of the most open AR browsers currently available. It is called Argon, and is developed by a research group at Georgia Tech. Argon is actually designed to showcase the group's back-end work, KHARMA, which is an effort to build an AR content server that runs on top of a standard HTTP server.
Part of what holds AR back from taking the world by storm is the lack of a truly standardized way to request and return geo-located data — the proprietary apps handle location-based references from Wikipedia, Flickr, Twitter and other sources in different ways, because each site has its own API, and none of them directly handles 3-D structures like multi-story buildings. KHARMA attempts to merge these requests into a common request framework utilizing and extension of KML the project dubs "KARML." Even though the current client is iPhone only, it uses no proprietary iOS features, and the project says it will deliver mobile apps for other platforms in due time.
The other mobile platforms are not so lucky. Symbian device users have only ever seen one open source option, OpenMAR, although the project seems to be in limbo as of 2011. There have been two AR demos showcased for Maemo, SSTT and SVSi, but neither of them seems to have made it to release. It is possible that the N900's lack of a digital compass short-circuited any chance of these apps making it big on Maemo, though, so perhaps MeeGo devices with a compass will prompt more work in the field. The fist webOS devices also lacked the compass feature that really makes AR easy-to-use, but HP did preview an AR app on an upcoming webOS tablet, so there's reason to stay hopeful for that platform as well.
For a concept as young as AR, it is par for the course for the open source solutions to spend the majority of their time building re-usable components like "browser engines" rather than focusing on end-user applications. That can be frustrating to users, of course, particularly on mobile platforms that are really geared towards the non-developer crowd.
If you are a developer looking to work with AR, there are several open source libraries designed to help. The extensible browser-based tools mentioned above — Mixare and LibreGeoSocial — offer similar feature sets for Android developers, notably pinning external URLs to specific latitude and longitude locations.
The Mixare project wiki has an introductory guide to developing your own apps using its code. LibreGeoSocial has more detailed documentation, including an "ARviewer SDK" and reference material on the GeoNode format it uses and the tagging system.
There are a couple of AR-related projects worth looking into as well, such as AndAR and ARToolKit. Both seem to focus more on the 3-D object embedding uses of AR which are often associated with games, but the same techniques can be used to overlay buildings and other non-interactive content onto camera video.
Intriguingly, there is also an open source AR toolkit specifically designed for the iPhone platform. Named iPhone ARKit (hey, I never said it was original), it offers an Objective-C library for iPhone developers, specializing in information overlay, and modeled on the iPhone's MapKit framework.
The biggest competitor to AR at the moment is actually geolocation services that run in the traditional Web browser. Firefox for Mobile, for example, has a long list of extensions that retrieve custom content based on your A-GPS or cell-tower-derived location. On top of that, Google and other search vendors are increasingly offering location-aware results that don't depend on a separate application to serve up content.
So, is AR a flash in the plan, soon to be outpaced by smarter browsers and Web services? Maybe, but only if it stands still. If you have used any of the mobile AR browsers, you'll know that the real advantage stems from its ability to seamlessly merge information with your field of vision. So while Wikipedia entries and geographic POIs are a start, the real gem is photo and video content, particularly when if offers the user something that can't be seen with the naked eye. Layar and Google Goggles have a head start in this arena right now; it's up to open source developers to push the idea further.
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Everywhere you look these days, is there a new device for sale designed to music, movies and entertainment on your TV without the hassle old-fashioned delivery systems such as cable or satellite. As a Media Center maker Boxee announced in last year, add a Linux based set-top hardware device was too what used a software product, it took a decidedly tougher market.
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OS from Jolicloud - vaunted for its cloud - and HTML 5 synchronization capabilities will be known as the Joli OS and Jolicloud will be used to refer to the online Office.
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With the release of Firefox 4.0 right corner, the big question for a large number of users is how fast is Firefox 4.0? How the new Moz compare with Google Chrome, Opera and the rest? If you're curious, take some time this weekend to perform your own performance tests and see for yourself. This consider a section of public participation: we are looking for your comments as well.
Whenever the released a new version of browser, you will see a rash of stories about browser benchmarks and how this or that browser are faster. The problem is that they focus generally on a test, and they are usually aimed at Windows - not users of Linux users.
Couple that with the fact that guides usually work with standard builds of browsers for Windows or maybe Mac OS X, on what systems are largely standard. Equipment varies, but the libraries system and such must be the same for all Windows 7 users, or all users of Mac OS X (modulo a few variations according to the question of whether reference systems have been updated correctly).
Linux users can get Firefox from their provider or from the official Firefox builds. They can use 32-bit version or 64-bit. They may have different versions of system libraries as they are on Fedora, Debian, Ubuntu, openSUSE, Debian, etc. In short, mileage may vary a bit depending on which build of Firefox that you run and what distribution you are running the. Not to mention the differences in hardware.
As the saying goes - if you want to do something right, do this yourself. Then let's look at the tools to test the performance of the browser in the privacy of your own home. In particular, we focus on three points of reference JavaScript, since that is where the real competition is today.
One of the oldest landmarks is the SunSpider JavaScript reference point. This test includes a variety of categories, some math, a chain of treatment, the creation of tagclouds, etc. Head just above the SunSpider page and click on "Start Sunspider 0.9.1 now" (or whatever the current version is when you check.)
When completed, Sunspider provide results something like this:
= Total results (means and 95% confidence intervals)-: 261 1ms ± 3.3%.In fact, it will give much more than that - all the Sub-tests results will be display as well. You can watch and see not only what browser receives the best results, but the tests they do well or poorly in. You will also receive a URL, you can bookmark and revisit later to compare the results in a browser or in the same browser. Note that the lower numbers are better with SunSpider, this result (in Chrome) is very good.
SunSpider is the oldest of the benchmarks, but there have been a few questions about the tests that it uses and whether they are applicable to the actual speed.
People of chromium use the V8 benchmark Suite to address V8. As soon as you load the reference page, it starts running. With V8, you get a set of results, in a blue box on the right side as follows:
Note: 3748Richards: 6693DeltaBlue: 4390Crypto: 7368RayTrace: 2886EarleyBoyer: 3586RegExp: 1437Splay: 3226Test results are broken down, and each test has a summary on the left side of the page. Save your results as V8 does not provide a linky practice to return to your results.
Finally, there is the most recent Mozilla reference point called Kraken. It is based on SunSpider, with improvements. The Kraken will take some time to download and run. As with SunSpider, lower numbers are better.
For best results, each testing bookmark, close all other Windows and apps and run each reference in its own window. You will likely skew the results by running the tests while making a compilation of the kernel while it analyzes a comparative browser and then then just fix running in a browser.
Run the tests several times each, as well. Does their execution once and then assuming that the number is the last word.
A thing are not benchmarks, tell you how well corresponds to a browser from Web pages and applications that you use on a daily basis. Perhaps Opera 11 blows the doors off a point of reference, but it sucks the exhaust pipe when it comes to Gmail. Perhaps Chrome comes last on a point of reference, but surprise arrives to do very well with Gmail.
Nothing compares to the real world test. If you have been unfortunate with Firefox performance prior to 4.0, give it another shot when 4.0 out instead of simply trust guides.
Don't forget that I said that this would be the participation of the audience?
Here's your weekend homework, if you're ready: close all your other applications and run the benchmarks in the latest version of Firefox 4.0, Chrome, Opera, etc. Provide your relevant system information and results of reference in the comments. What system information? Lucky that you requested!
Distribution and versionProcessorMemoryThus, for example, I would post Linux Mint 10, Intel Core i7 Q720 1.60 GHz, 8 GB of RAM. Let us know if you use a 64-bit or 32-bit system. If you do not know what CPU you have, you can execute cat/proc/cpuinfo in terminal, or use one of the tools of GUI system information to know. If you have forgotten how much RAM you have, it is sufficient to run free-m for an index, or designate a GUI tool.
Sorry to give you assignments on weekend - but if even one of the twenty Linux.com readers runs tests and provides points of reference, we will have much to compare and a better image of the browser landscape. Happy benchmarking!
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If you are a Linux system administrator, chances are you have more than a machine you are on a daily basis for responsible. You have even a Bank of machines that you maintain that are similar - a farm of Web servers, for example.. If you must enter the same command on multiple machines at once, you can log each with SSH and do it serially or you can save time and effort and use a tool like ClusterSSH.
ClusterSSH is a TK/Perl wrapper standard Linux tools like XTerm and SSH. As such, it'll run on just about any POSIX compliant OS available I have the libraries - it on Linux, Solaris and Mac OS X run. It requires the Perl libraries of TK (Perl TK on Debian or Ubuntu) and X 11: Protocol (libx11-Protocol-Perl on Debian or Ubuntu), in addition to xterm and OpenSSH.
InstallationClusterSSH install on a Debian or Ubuntu system, is trivial - a simple sudo apt-get install ClusterSSh will install it and its dependencies. It is packaged for use with Fedora and is installable via the FreeBSD ports system. There is also a MacPorts version for use with Mac OS X if you use an Apple computer. Of course you can compile from source.
ConfigurationClusterSSH can be configured via its global - etc/clusters or about a file in the users home directory is. csshrc. I tend to favor user level configuration, how, who can choose more than one person who set up your ClusterSSH client on the same system as you. Configuration is easy in any case, as the file format is the same. ClusterSSH defines "Cluster" as a group of computers that want to control via an interface. In this sense your cluster at the top of the file in a "Cluster" block list and describe any cluster in a separate section below.
For example, say I have two clusters, each consisting of two machines. "Slave" has the machines "test1" and "test2" it and "cluster2" machines "test3" and "9" in it. Which
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Open Source Apache documentation is evolving in new Couchbase offering server.
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For those of you using the Suite of tests of Phoronix or OpenBenchmarking.org, the Phoronix 3.0. 1-Iveland Test Suite is now available. This is the release of point expected first - and only - after tests Phoronix 3.0, following its late launch of the last month of the Southern California Linux Expo...
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Gabriel Burt has released an update on his blog about the music Banshee on Ubuntu default store. The new plan is as follows:
Banshee's Amazon store will remain enabled, with canonical affiliate revenue, take a 75% reduction in all 25% on Ubuntu now go to the GNOME Foundation. The Ubuntu one store for Banshee are enabled by default but now canonical will donate 25% of sales to GNOME. You will now do the same for Rhythmbox.The basis of the wording in the blog post, would this seem a unilateral decision by canonical/Ubuntu, and one that perhaps the Banshee developers are not completely satisfied. (Thanks to Jeff Schroeder)
Read more on LWN
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Red Hat Announces the fourth annual Red Hat EMEA Partner Summit will take place in Dublin, Ireland, at the Centre of the Congress of June 5-8, 2011.
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If you're anything like me, you love a good map graphic, particularly one that brings what would otherwise be dull and boring data to life. The technical term for tools that render statistics into visual form with maps are geographic information systems (GIS). Open source has a wealth of top-notch GIS tools like GRASS and gvSIG, but their power comes with a learning curve. TileMill is a new tool that bucks the trend, letting complete newcomers to GIS build slick looking static or interactive maps with minimal fuss.
TileMill technically runs as a Web app, but it is designed to be installed locally, on top of Apache and PostgreSQL, and accessed through Firefox. "Locally" specifically means that TileMill needs to access your locally-stored data files in order to paint them onto your map projects, and that (at present) the program has no concept of user accounts or authentication. The Web app interface stems from two of TileMill's open source underpinnings: the Mapnik map renderer (of OpenStreetMap fame), and the CSS-derived syntax used to mark up map elements.
With TileMill, you create your map by adding discrete data "layers" to a map template. Each layer can include point data, lines, polygonal shapes, or raster images, and you can stack and re-order them at will. How they appear is determined by CSS-like stylesheets, which you edit in a separate pane. Every layer automatically gets its own "ID," so you can set color and blending at its simplest by using one style rule per ID. But you can also define additional "classes" and further refine display characteristics, even building up conditional rules.
TileMill gets its simplicity in two ways. First, it offers only one type of map projection: Web Mercator, which is the widespread, standard 2-D projection used by most web-based mapping services. Second, it requires you to convert your input data into any of a handful of popular GIS formats, so it can make intelligent assumptions about important factors like the coordinate system used. As a result, you cannot do fancy transformations with TileMill, or create cartograms, but what you can do is render your data on a nice-looking map, control its presentation, and even export it to your choice of output formats.
To install TileMill, visit the project page and scroll down to the installation instructions. They list Ubuntu 10.10 as the supported distro, but the instructions are detailed enough that any other contemporary distribution should be able to follow them. The main steps are installing the rather lengthy list of prerequisite packages, then checking out the latest version of Mapnik and installing it. The TileMill code is hosted on GitHub, and the downloadable installer is actually the most difficult step in the entire process. Rather than a bulky binary package, it is an ndistro meta-installer, which fetches individual packages from GitHub over the network. It sounds nice in theory, but GitHub has a nasty habit of timing out and failing during these downloads, forcing you to start over from scratch. My advice is to start well after business hours are over.
Once you do get the packages installed, TileMill runs on localhost port 8889. The home screen helps you wrangle three components: your active map projects, your exported final products, and your data "libraries." Obviously most of your time is spent in the active map projects, but configuring data libraries is vital, too. Libraries can be either local directories or Amazon S3 storage, and they are not visible in the map editor until you add them in the library manager.
The map project editor has four panes: the map itself on the left, a list of the map's layers beneath it, a color-swatch and font-selector next to that, and the stylesheet editor, which takes up the right half of the page. The map always starts out with a global view, but as you edit you can zoom in (using the same zoom-factor numbering as found in Google Maps and OpenStreetMap, conveniently) and limit the scope of your final product. By default, the contents of this map are the #world layer, which shows up in both the layer list and the stylesheet editor with a sensible color scheme.
Adding your own data layers is where the action is. All you need to do is click the "+" button in the layer list, then give your new layer an ID and pick its source data from the file selector. As of today, TileMill can import ESRI shapefiles, KML (although not compressed KMZ), geoJSON, and geoTIFF data. The app does its best to recognize the spatial referencing system (SRS) string used in each, but there are some quirky limitations to the format support that can cause headaches when you first get started. For example, ESRI shapefiles actually include three files per data source ( a .shp, a .dbf, and a .shx), and TileMill expects to find them all together in a .zip archive). Similarly, TileMill supports KML files, but only for vector line data, not points or polygons. That can be frustrating if, like I did, you are forced to use online format converters (like GPSVisualizer and MyGeodata) to try and wrestle your data into a compatible format.
When the layer is loaded, you can let your artistic side take over. You can rearrange the layers just like you would in GIMP or another image editor, and TileMill automatically creates a stylesheet ID from your layer's name, so you can start theming it in the stylesheet editor immediately. The online manual refers to the stylesheet language as "MSS" for "map stylesheet;" it is essentially CSS syntax, but with a more limited set of options that deal exclusively with rendering the points, lines, polygons, and text labels on the map. The great thing is that the stylesheet editor has built-in syntax highlighting, line numbers, and a "Save" button that instantly applies your changes. Plus, there is a built-in language reference: clicking the book-shaped icon in the corner brings up a categorized guide with example code.
The color-swatch window pane automatically grabs every RGB hex-color you type in the editor and renders it as a button in the palette. That helps you work by keeping all of the colors together, and if you want to reuse any color, you can punch the button and it's MSS code will be inserted right into the editor at the cursor location.
If you're happy with your map, you can export it as a PNG image, a PDF, or as MBTiles, the SQLite-based format used for saving interactive Web maps offline. The export tool lets you resize and zoom in on the map to select exactly how much of the globe it shows, and the final dimensions of the output.
GIS heavy-hitters may not find TileMill terribly powerful, but for the rest of us, it is a great way to make good-looking maps with minimal time. I have only scratched the surface of MSS stylesheet's capabilities: you can add multiple stylesheets to your maps, nest style rules, and use classes to refine how your data is displayed. As a playground, it couldn't be easier.
For the moment, the weak link in TileMill's toolchain is probably its data import functions — they are amazing in their simplicity, but the format limitations make it impossible to debug problems. I started out exporting a list of Zip Codes from the Texas Linux Fest conference that I help with, thinking I could place them on a map to make a nice graphic. But despite multiple attempts at converting the CSV data into KML, ESRI, and GeoJSON, I could never quite get it into a form that TileMill liked — either that, or it failed to recognize the file in the data library browser — and there was no built-in or online help to consult. So for simplicity's sake, I eventually went with the multiple "starter" data sets that come bundled with TileMill to try out my MSS theming skills.
TileMill is still in constant development, so I'm sure import will only improve with time. Maybe with a little extra documentation, you can sidestep my import problems and get right to work. You certainly don't need to set aside a large chunk of time for designing the map itself: TileMill makes short work of that. I also hope real instal packages come along by the time of the next release; fetching code live from GitHub is too unpredictable and the current ndistro installer reports success even when fails to grab all of the files it needs. After all, what we all want to do is get straight to editing the maps — and TileMill actually makes that part fun.
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Little Linux plug computers come ready-to-use. But are still Linux, means which hackable. Today we learn how to create a custom kernel for a plug computer.
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The Slackware developers, probably the oldest Linux distributions still maintained, published the first release candidate of the next stable version. They also have the possibility to change the planned 13.2 to 13.37 version number
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This tutorial explains how you can configure Apache2 to set the HTTP Expires header and directive max - age of the HTTP Cache-Control header for static files (such as images, CSS and Javascript files) to a date in the future so that these files will be cached by browsers of your visitors. This saves bandwidth and makes your web site appear more quickly (if a user visits your site for a second time, static files will be recovered in the browser cache). This tutorial was written for Debian Squeeze.
For more information on HowtoForge
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With the new Appsperience program planning Google its Google cloud connect for Microsoft Office for companies trying to simplify.
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Here are the results of our most important Linux file system compared to this day. What is us using Linux kernel 2.6.38 be released, on a disk SATA hard and Solid-State drive, comparing seven systems of files on each drive with the most recent kernel as of this past weekend code. The tested file systems include EXT3, EXT4, Btrfs, XFS, JFS, ReiserFS and the NILFS2.
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David Airlie has just emailed Linus Torvalds with its main DRM (Direct rendering Manager) pull application for the Linux kernel 2.6.39 that 2.6.38 was released earlier this week. As mentioned a few days ago, the Linux 2.6.39 kernel will feature a number of changes interesting for graphics drivers open-source, among other areas...
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Alcatel-Lucent edges of Juniper Networks for number two spot in the latest rankings, which saw a general increase in revenues for the past year.
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Patrick Volkerding, founder and maintainer of the oldest survivor of the distributions of Linux in the world, has been updated changelog "Aware" of Slackware Linux with the following words: "Slackware 13.37 release candidate 2 is ready for testing." Y we almost? "This comes just a week after the first release candidate. In the course of...
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Business Intelligence suite enhances the capabilities of caching in memory for users of the enterprise and Open Source.
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New version of SUSE Enterprise Linux server for SAP applications based on SLES 11, law firm now for all SAP workloads, must expand the partnership.
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With Ubuntu 11.04 coming in a little over a month, key packets found in this "Natty narwhal" release are almost resolved. For interested parties on the stack of open-source ATI graphics, packets of note are the Linux 2.6.38, Mesa 7.10.1 and xf86-video-ati 6.14.0 kernel. What this means for the typical user? This article provides an overview of the State of the open-source ATI in Ubuntu 11.04.
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There are many mobile applications that use software open source, but how many of them is in compliance with the open source licensing rules? It turns out that very many steps.
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You may be aware, but magic step happens in the context of the Linux operating system. Without your help or intervention, programs to start and run daemons. These things happen because Linux is an exceptional programming system called cron. You want to do some magic? Let's get to know cron.
The cron utility allows the user to manage scheduled tasks from the command line. Once a user includes how cron works, it is not difficult to use. But for some, the understanding can be a challenge. Users must understand how Linux interpreter and reads the time on a system. Also, users must know how to edit their crontab files. Once a user has a full understanding of these concepts, they will be the masters of cron. Look at cron, and how to create entries in a users crontab file '.
By default, a version of cron (there is more than one implementation) will already be installed on the Linux system, so there is not place to worry about installation of the tool. And with respect to its use, there are two commands associated with cron:
cron: the daemon which is used to run regular commands.crontab: the command used to invoke the editor to manage users cron jobs.A users crontab file ' is the file that contains read by cron jobs. Each user on a system may have a file crontab (including the root user) where the jobs and tasks can be controlled. The system itself also has a crontab file located in/etc/crontab, but should not be changed by the user. This file is generated during the installation of the operating system. If the file/etc/crontab is examine it is revealed that she actually control cron jobs located in/etc/cron.daily, /etc/cron.weekly and/etc/cron.monthly. But this file is not going to be the focus here. Instead the user crontab file will be the main element, as is the file used for the planning of the ordinary user tasks.
One of the aspects of cron that most users to travel so far are the way that time is used. For each crontab entry a specific time is declared for when the entry will be executed. The time entry is in the form:
0 23 *.Each entry of time consists of five sections:
Minute (0-59) hour (0-23 with 0 being 12: 00 AM) day of the month (1-31) month (1-12) day of the week (0-6 with 0 being Sunday)If a typical entry might look like:
Minute hour day mtee dayOfWeek
Some examples of time:
0 23 * Every day at 11 PM
30 22 * Every day at 10: 30 am
23 0 1 * Each first day of the month at 11 am
0 23 * 0 Each Sunday at 11 A.m.
Now that time is included, it is time to start adding entries. To view a users crontab file ' the crontab command is invoked. There are three main options for use with the crontab command:
e: Edit the crontab file.l: list the contents of the file.r of crontab: delete the contents of the crontab file.Where the crontab-l command is invoked for crontab users file entries will be poster (if applicable). To add an entry to the crontab file a users', the EI crontab command is invoked for the crontab file will be opened in the default editor (such as ed, vim.tiny or nano). When the command of e - crontab is executed for the first time, the default editor is defined. To select the default editor for crontab, select the number that corresponds to the desired Editor.
Figure 1 shows a crontab entry created by the backup application Luckybackup .
A crontab open, with Nano as editor by default, showing the Luckybackup entry.
To illustrate how add a new entry in crontab, a simple backup script will be used. The contents of this script might look like:
#! / bin/bash
echo backup begins "date" > ~/backuplog
mkdir/media/EXT_DRIVE/backup /'date + % Y % m % of
tar - czf/media/EXT_DRIVE/backup /'date of telecommunications +%Y%m%d'/data.tar.gz
echo completed backup "date" > ~/backuplog
Where EXT_DRIVE is the location of an external connection drive where the backup data will reside.
The above script is saved in the directory of users such as. my_backup.sh and executable permission with the command chmod u + x ~ /. my_backup.sh. Now, with crontab in edit mode, create an entry that will allow to run the script every night at 11 pm, add the following line:
* 23 * ~/.my_backup.shWith the entry into force, save and close the editor (will depend how it's done on the default editor that you chose). When this is done, as long as there are no errors, crontab will report "crontab: installing new crontab" to indicate the entry has been successful. If there are errors, open the file crontab back up to make the necessary changes.
Say that a different users crontab should be edited. It is not necessary to su to this different user, as crontab has an option built in for that specific purpose. If crontab is issued using the u - like crontab EI u user name, the crontab file of the specified user (where username is the user in question) will be opened for editing. This command, however, can only be issued by a user with the administrative user (or the command can be issued using sudo). Of course, editing crontab files other users should be limited to administrators.
The cron system helps make Linux one of the operating systems more flexible around. Cron allows not only the system keep its logs a rotation and clean, it allows users to set their own tasks, scripts, and jobs. Although the aspect of time cron can be a little difficult to understand, once it is understood, the rest falls into place.
If the idea of modifying entries cron for command line seems a little much, you'll be glad to know there are GUI tools for this task. Take a look at a such tool GNOME schedule (found in your Add/Remove software tool) for an application that can manage your tasks cron with the help of user-friendly graphical interface. But for those who want to really understand Linux, familiar with cron and crontab is essential.
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This guide explains how you can install and use KVM for creating and virtual machines running on a server Debian Squeeze. I'll show how to create virtual machines on images and also virtual machines that use a logical volume (LVM). KVM is short for focus on the core of Virtual Machine and makes use of hardware virtualization, that is, you need a CPU that supports hardware virtualization, e.g. Intel VT or AMD - V.
For more information on HowtoForge
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Datalight has a new version of reliance Nitro file system target embedded Linux devices. Reliance Nitro SDK for Linux 2.0 improved read and write performance, fast boot times, solid reliability and offers a wide range of validation and test tools, the company says....
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Some Linux server administrators are comfortable with paddling through text logfiles, but why wade when you can create beautiful tables and graphs that highlight areas to problem? Try the excellent CairoPlot for beautiful and informative visual server log analysis.
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