Everyday Notes from a Unix Administrator. A website created to serve as online notes, documentation, tips and tricks for System administrators.


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Recent Posts

Configuring postfix relay for mail sending Ubuntu 16.04
Postfix can be used to send mails to an external SMTP relay which is helpful if you want to setup
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Raspberry Pi Thin Client
This tutorial creates a Raspberry Pi, a low cost single board computer, which can be used as a thin client
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The Linux Filesystem Explained
Have you ever wondered what all the folders on the root (/) directory of the Linux filesystem are for? Which
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Comparing files using the diff command
The diff command outputs the differences between two files, line by line. For files that are identical it produces no
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How To Tell If Your Linux Server Has Been Compromised
A server being compromised or hacked for the purpose of this guide is an unauthorized person or bot logging into
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How to effectively use the GREP command
Grep is a very important & powerful Linux commands. It stands for ‘Global Regular Expression Print’ & is used for
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bash Tips and Tricks
I call these tips and tricks – “bash kung-fu”. You can save a lot of typing with these handy bash
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17 Things about Security
A list for protecting yourself and others from the most common and easiest-to-pull-off security crimes. This article does not attempt
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Test internet speed from the Command-line
You probably have heard and tried using speedtest.net to test you computer or smartphone internet speed. If you have your
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How to find out PID in Linux
Every Linux process has a process ID (PID) assigned to it.  It is a unique identification number that is automatically assigned
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