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from IBM DeveloperWorksHow to convert a physical server to a virtual one using the open source tool Clonezilla LiveSummary: Learn how to use the open source Clonezilla Live cloning software to convert your physical server to a virtual one. Specifically, see h...

I learned at least three things from this list, and I’ve been using ls for years.15 Basic ‘ls’ Command Examples in LinuxThe new things for me were: ls -lh – human readable format on file sizes ls -ltr – reverse output order, which is particularly useful when s...

Here are some interesting examples of cron job use. http://www.thegeekstuff.com/2009/06/15-practical-crontab-examples/ – I didn’t know about @monthly, @yearly, and @reboot, or changing the MAIL destination setting. http://www.pantz.org/software/cron/croninfo.h...

If you have any tools for monitoring Linux, or have comments or limitations on these, please add them to this article. Thanks, 15 Command Line Tools to Monitor Linux Performance

Linux Tools for Digital Imaging, Graphics and Spherical Panoramic PhotographyDigital photographic image technology, representations, formats, Linux software tools for image viewing, resizing, editing, graphics manipulation, panoramic stitching and spherical pa...

I’ve used scp for years, but didn’t know many of these options. The compress-before-transferring and recursively copying a subdirectory structure, look particularly useful. 12 scp command examples to transfer files on Linux

The Linux “tee” command is extremely useful in the right situation. This article gives some good examples: http://linuxaria.com/pills/linux-terminal-the-tee-command

count logins in last commandIf you want to take the output of the Linux last command, and get a count of how many times each user connected to your server, this script will do.sample inputtommytrojan sshd abc.def Fri May 15 13:30 - 13:30 (00:00)j...

Here’s an intro to understanding what’s going on with a Linux server, quickly.http://techblog.netflix.com/2015/11/linux-performance-analysis-in-60s.htmlIf anyone has others, please post them here.

Regular Expressions are how you match text and patterns of text in a programming language, and once you learn it, it’s useful in many languages. Regular Expression Cheat Sheet RegExr is an online tool to learn, build, & test Regular Expressions CROSSWORDS ...

Learning Shell Scripting Language: A Guide from Newbies to System Administrator – October 3, 2013 Bash shell scripting Tutorial – Part I Advanced Bash-Scripting Guide bash Cookbook – UCLA only – licensed through O’Reilly Safari books online Unix: Debugging y...

Return count of timestamps with most error logs. A couple years ago an app error_log reported about 16000 errors within a few seconds. After fixing it, we wanted to sort by number of errors per second. This does that. The first column is the count. cat /logs...

Guide to setting up php-odbc for connection to Registrar database. Example for RedHat EL 5.Create file tds.datasource.template:[Registrar]Driver = FreeTDSDescription = UCLA Registrar (SRDB)Trace = NoServer = srdb.registrar.ucla.eduPort = 1433Create file t...

I’ve been using grep (Global Regular Expression Print) to search files on Unix for years and never knew you could have it appear in color. And here are some other interesting articles about grep. http://unstableme.blogspot.com/2009/03/highlight-match-with-col...