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Demystify Linux Bash Test and Comparison Functions

  • IBM/developerWorks; By Ian Shields (Posted by IdaAshley on Feb 22, 2007 4:34 AM EDT)
  • Groups: IBM, Linux
Are you confused by the plethora of testing and comparison options in the Bash shell? This tip helps you demystify the various types of file, arithmetic, and string tests so you will always know when to use test, [ ], [[ ]], (( )), or if-then-else constructs.

Other Popular Articles

A Good Week or So for Linux

Scot Finnie, Microsoft Windows advocate and known best for his award-winning Scot's Newsletter, smacked Vista around the room a bit. When he was done there, he decided Microsoft itself needed a bit of dusting-up as well.

Linux: 2.6.21-rc1, Dynticks Merged

Linus Torvalds announced the first release candidate for the upcoming 2.6.21 kernel, ending the two-week merge window, "there's a lot of changes, as is usual for an -rc1 thing, but at least so far it would seem that 2.6.20 has been a good base, and I don't think we have anything *really* scary here." Linus noted that the tickless kernel patch was finally merged into the mainline kernel, "the most interesting core change may be the dyntick/nohz one, where timer ticks will only happen when needed. It's been brewing for a _loong_ time, but it's in the standard kernel now as an option." Thomas Gleixner explained a year ago how this could result in cooler CPUs and power savings, "the tickless kernel feature (CONFIG_NO_HZ) enables 'on-demand' timer interrupts: if there is no timer to be expired for say 1.5 seconds when the system goes idle, then the system will stay totally idle for 1.5 seconds."

Cybernetics Oriented Programming (CYBOP) Book

After five years, I finally managed to put my ideas into a book, which I would like to announce to the developers of the medical software community, because I was greatly influenced by their discussions. More information about the book can be foundhere

Ballmer impugns the character of the free/open source world

At a recent news conference, Microsoft CEO Steve Ballmer sought to impugn the character of the free/open source world by implying that it had no respect for the intellectual property rights of others. It's not just the enormous ignorance embodied by this duplicitous braggadocio that caught my eye, it's the fact that the claim is coming from a man associated with Microsoft, which is far and away the most notorious IP thief of all time.

KOffice 1.6.2 Released

The KOffice team today released KOffice 1.6.2, the second bug-fix release in their 1.6 series. Although this is a maintenance release, there are some new features in Krita (new filters and a smudge paint operation) and Kexi (a new User Mode to deploy Kexi applications). Many bugs were fixed, thanks to the helpful input of our users. We also have updated languages packs with no less than 4 new languages. You can read more about it in the announcement, and the release notes. A full changelog is also available. Currently, you can download binary packages for Kubuntu and SUSE.

AMD 8.34.8 Display Driver

  • Phoronix; By Michael Larabel (Posted by phoronix on Feb 22, 2007 12:07 AM EDT)
  • Groups: Intel; Story Type: News Story
Last month with the 8.33.6 release we had seen the first signs of Radeon X2000 (R600) product support. The AMD Radeon Xpress 1250 IGP (both Intel and AMD processor models) are supported by today's driver. Additional work has gone into the 8.34.8 drivers with this release to prepare for the Radeon X2000 launch shortly. More information will be available shortly.

Puppy 2.14 Screenshots

  • (Posted by lqsh on Feb 21, 2007 11:20 PM EDT)
  • Groups: Linux; Story Type: News Story
This new Puppy has major improvements in the underlying architecture as well as the applications, and some new applets created by Puppy enthusiasts. Finally we have embraced the XDG menu system, our new PET package management system is further refined. New applets are Pfind (file finder), and Grafburn (CD/DVD burner). Upgrades are many, including Pupctorrent (torrent download client), Network Wizard, Pbcdripper (CD ripper), PuppyBackup, SoxGui (audio file 'Swiss army knife'), mtPaint, elscpi. Plus lots more - DistroWatch. Screenshots of Puppy 2.14 are available at

Protech Beta Screenshots

Protech is an Ubuntu-based distribution made for security professionals and programmers. - DistroWatch. Screenshots of Protech Beta are available at

SATA Framework Overview

  •; By Pawel Wojcik (Posted by dba477 on Feb 21, 2007 9:45 PM EDT)
  • Story Type: Reviews; Groups: Sun
As many of you noticed, Solaris now supports SATA controllers and devices. To simplify writing SATA HBA drivers the new module and a set of interfaces was created, referred to as either SATA Framework or SATA module.

InstallJammer, a self-executing installer for Linux

In the crowded Linux packaging landscape, it would be easy to overlook Damon Courtney's InstallJammer. However, InstallJammer, which provides self-executing installers for Linux and other operating systems is well worth a look. Version 1.1 was released recently with a number of new features, including support for RPM and Debian package databases, console-based installs, new platforms, and much more.

Opening up an open-source roadblock

If the FSF succeeds in blocking a landmark deal, the biggest losers will be software consumers, policy analyst James DeLong says.

Tidy URL Rewrites with PHP

Tim Bromhead, in a new entry over the blog, talks about writing neat and tidy URLs with PHP. He says, to do this you have to set up URL rewrites in Apache to send all page requests through a single PHP script. In this post he shows you, how to make the URLs with spaces easy to type for users.

NetServer Adventures

So I got this machine, and decided to set it up as an Icecast server to play with...

HP NetServer 4d/66 LM
2 x AHA-2740 offboard SCSI controllers
1 x AIC-7770 onboard SCSI controller
2 x 9GB SCSI hdd
1 x Intel EtherExpress 16 offboard NIC

Read on for the adventure!

Digital Doorways open communities to technology

Digital Doorways, a joint project between the Department of Science and Technology and the Meraka Institute, will provide rural communities with access to the various open source projects in a bid to improve South Africa's computer literacy.

ESR gives up on Fedora

The following letter is shown verbatim, as received from ESR, who has sent it to a number of Linux-related publications and mailing lists.

Bounty out on spammers

Spammers beware! A new programme launched by the Internet Society of South Africa has placed bounties on the heads of spammers. Bounty hunters could receive as much as R30 000 for a spammer's conviction.

FOSDEM conference: three days to go

The last interviews have been published for the FOSDEM conference, which starts in just three days. The list of interviewees is impressive this time around, with Simon Phipps from Sun Microsystems, Jeremy Allison from Samba, Keith Packard from, Miguel De Icaza (Mono/Novell), Paul Everitt (Plone and Zope), and Pete Herzog (Open Source Security Testing Methodology Manual).

How To Search For Missing Packages With apt-file On Debian and Ubuntu

This short article describes how you can search for missing packages with apt-file on Debian and Ubuntu systems. apt-file allows you to search for a file name, and it gives back the name(s) of the package(s) containing that file so that you can install the appropriate package.

Open Source Mono Gets Visual Basic

Mono has long tried to provide an open source alternative implementation of Microsoft's .Net framework. It has succeeded in some respects, and in others it has been lacking, especially when it come to Visual Basic. That is no longer the case. As of Mono version 1.2.3, the Novell led project now includes new Visual Basic capabilities allowing development and deployment of Visual Basic for Mono on Linux platforms. The 1.2.3 release is the third point release in the 1.2.x series which was first released in November of 2006.

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