The Linux Compendium
This guide shows you how to retrieve system details of your Debian 11 or Debian 10 system, e.g. kernel name, kernel release, kernel version, hostname, hardware architecture, processor type, hardware platform and operating system information. This guide was tested with Debian 10, but the commands shown here also work with other Linux distributions. How to … Read more
Most Ubuntu systems use bash or dash as their default terminal application. You type your commands at a standard command prompt, which usually displays your username, hostname, and current directory in a predefined color scheme. Bash provides many customization options for the command prompt that allow you to not only add different functions to the … Read more
As Linux users, we sometimes need to know what port number a particular process is listening on. All ports are associated with a process ID or service in an operating system. So how do we find this port? In this article, we will present three different methods that you can use to find out which … Read more
What is iptables? Iptables is a command-line firewall program that allows or blocks traffic based on the policy chain used. Iptables takes a packet-based approach to monitor traffic. When a program tries to connect to your system, iptables looks for a rule from a predefined list. If a rule is not found, it falls back … Read more
The performance of a computer or server environment very much depends upon the system memory and disk usage. If something is consuming more disk space then it will lead to a system error. Likewise, increasing log file size must be controlled to reduce such risk. Logrotate was introduced as a system utility that rotates, compresses … Read more
We all know how important it is to use strong passwords for our systems, online accounts, and other sensitive applications. The real question is how you generate a password that you can rely on and that meets the criteria of a strong password. Ideally, a strong password must contain lowercase and uppercase letters, numbers, and … Read more
If, like me, you like to do all your Ubuntu tasks from the command line, you’ll also be looking for ways to play audio files, especially mp3s, from the command line. In this article, we’ll tell you how to install and use the famous command-line program Sox to listen to mp3s in your terminal. We … Read more
NTP stands for Network Time Protocol. It is a protocol or service used to synchronize the clock of your client computers with the clock of a server. The server’s clock is also synchronized with the Internet. In this article, I’ll show you how to set up an NTP server in your environment and synchronize the … Read more
Bash scripts are very popular and one of the simplest scripting languages. As with any programming or scripting language, you will sometimes output text to the terminal. This can happen in many scenarios, for example, when you want to print the contents of a file or check the value of a variable. Programmers also debug … Read more
GNU Octave is an interpreted high-level programming language with numerous software features intended mainly for numerical computations. It provides solutions for numerical linear and nonlinear problems and for performing various other numerical experiments with compatible languages such as MATLAB. Octave provides extensive graphical features for visualization and data manipulation. Typically it is used through its … Read more