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Tales from the Field: A System Administrator’s Guide to IT Automation

Download this collection of short stories about the excitement, frustrations, and challenges associated with learning IT automation.

How to Use lsof Command in Linux to List Open Files

Have you ever had the file in use error? Learn how to use the lsof command in Linux to view open files and the processes using them.

How to Use Lynis Linux Security Audit Tool on Ubuntu

Lynis is an open-source security auditing tool for extensive scanning of systems and its security defense to achieve compliance testing and system hardening. This article will help you to install Lynis from its official package repository and audit the system security in Ubuntu 20.04 LTS systems.

6 Best Mail Transfer Agents (MTAs) for Linux

On a network, mail clients send messages to a mail server which then routes them to the correct destinations (other clients). The mail server uses a network application called Mail Transfer Agent (MTA). Here, we take a look at the six top options.

Styli.sh is a Great Dynamic Desktop Wallpaper Changer for Linux

Bored seeing the same wallpapers every day? Automatically switching wallpapers is probably the best way to keep your desktop fresh and full of surprises. This article will show you how to automatically set new wallpapers using Styli.sh on Linux.

Tootle – GTK Client for Mastodon

Mastodon is a free and open source microblogging platform similar to Twitter, but with user privacy and decentralization in mind. It’s one of many protocols that interacts with the Fediverse of protocols like Pleroma, GNU Social, and others. Unlike Twitter, Mastodon is not one social network. You can use Mastodon...

3 Useful Tips on How to Use History Command in Linux

One feature of the Bash shell that can be changed is the history command. Learn 3 useful tips on how to use the history command in Linux here.

How to Install Craft CMS with Nginx on Ubuntu 20.04

Craft CMS is a free, open-source content management system for websites. This guide shows how to install Craft CMS on Ubuntu 20.04 LTS (Focal Fossa).

How to Install iRedmail on Ubuntu 20.04

iRedmail is an open-source mail server solution that can deploy a full-featured mail server in several minutes. Learn to install iRedmail on Ubuntu 20.04 here.

How To Set Up SSH Public and Private Key in Linux

SSH or Secure Shell Protocol is a cryptographic network protocol that is used to securely access a remote machine from another computer over an unsecured network via the command line. With SSH, you can execute commands on remote Linux systems and servers, send/transfer files, and normally manage everything you...

Bash Script to Monitor Memory Usage on Linux

This shell script will trigger an email when more than 60% of your system memory is used.

Translate rwx Permissions into Octal Format in Linux

Sometimes you may find it useful to display the access rights of files or directories in octal form instead of rwx or perhaps you want to display both. Instead of using good old ls -l command, in most modern Linux distributions (if not all) you will find stat, a...

How to Compress Files with zstd Utility in Linux

If you want to save some space on your disk, you can compress your files and directories to save some space. Here's where to learn how to use the zstd tool.

Exa – A modern replacement for ls command

Listing the contents of a directory is a common task that Linux users carry out. The ls command is commonly used for this operation and it sure does a decent job in displaying all the files and sub-folders contained in a directory. Exa is a fast & improved file...

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