This is the part one of the four part series on the basics of how to use Ansible. There will be a gradual introduction from basic to intermediate examples how to install, setup and use Ansible. As well as the how to create ansible playbooks and roles. Let’s get started with Part One: Installation and Setup.
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Linux
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 notification sending from your server. The following steps will outline email sending using the Linux command line directly which can also be used for monitoring scripts that can send email notifications. Continue reading “Configuring postfix relay for mail sending Ubuntu 16.04”
Raspberry Pi Thin Client
This tutorial creates a Raspberry Pi, a low cost single board computer, which can be used as a thin client that works with RDP, VMWare View, Citrix, OpenNX, and Spice. The base image for the OS is based on Debian.
The Linux Filesystem Explained
Have you ever wondered what all the folders on the root (/) directory of the Linux filesystem are for? Which file goes into which directories and why are they saved in those directories? On this post, we’ll check out each folder and what purpose or function they serve for the operating system itself. Continue reading “The Linux Filesystem Explained”
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 output, for binary files only reports if they are different or not.
The set of differences produced by diff is often called a diff or patch, and this output can be used later on by the patch command to change other files. Continue reading “Comparing files using the diff command”
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 the server in order to use it for their own, usually negative ends. However, the majority of compromised servers are carried out by bots i.e. automated attack programs, in-experienced attackers e.g. “script kiddies”, or dumb criminals. These sorts of attackers will abuse the server for all it’s worth whilst they have access to it and take few precautions to hide what they are doing.
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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 matching & printing a search pattern or a regular expression from a single or multiple text files. It will look for the pattern if the mentioned files & will than print the result on screen or to an output file.
In this tutorial, we are going to learn to use grep command with examples. Continue reading “How to effectively use the GREP command”
bash Tips and Tricks
I call these tips and tricks – “bash kung-fu”. You can save a lot of typing with these handy bash features.
bash, or the Bourne again shell, is the default shell in most Linux distributions. It has many features to enhance user-friendliness and productivity. Unfortunately, you can’t take advantage of those features unless you know they exist. So here are some bash tips and tricks that will help you with your everyday system admin tasks.
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