Sys admin

Man pages are written by sys-admin and developers for IT techs, and are intended more as a reference than as a how to. Man pages are very useful for people who are already familiar with Linux, Unix, and BSD operating systems. Use man pages when you just need to know the syntax for particular commands or configuration file, but they are not helpful for new Linux users. Man pages are not good for learning something new for the first time. Here are thirty best documentation sites on the web for learning Linux and Unix like operating systems.


Anyone who has never made a mistake has never tried anything new. — Albert Einstein.

Here are a few mistakes that I made while working at UNIX prompt. Some mistakes caused me a good amount of downtime. Most of these mistakes are from my early days as a UNIX admin.


Like most sys admin, I’m lazy. I try to automate almost all things in order to save time. Inexperienced sys admin and help desk staff working under me finds all these tools useful. It saves their time and avoids security issues. Automation allows help desk staff to do things that they don’t have enough direct system knowledge to do themselves. However, selecting correct tool and applying correct methodology is very important.

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Take the Free Software GPL / LGPL licensing quiz and test your knowledge of the GPL and LGPL.

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Since y’day I noticed one of our article related to spam blocker receiving lots of traffic. I received couple of calls from our clients because most emails was getting bounced via Exchange or Postfix mail server. ORDB is now configured to return each IP as spam source ORDB was a database of open relay […]


Perl is a dynamic programming language created by Larry Wall and first released in 1987. Perl is used in many sys admin and web related projects. Perl 1 was released to the public by Larry Wall 20 years ago today. Perl 5.10 isn’t just a bug fix version: it’s full of new features that I’m […]


Practical Extraction and Report Language is hackers and sys admin’s # 1 choice language :) This site offers examples – perl one liners for command line use, a summary of important perl command line arguments, and how to convert between 1-liners and full Perl scripts. This page assumes the reader has a reasonable amount of […]

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