How to set up passwordless SSH on Linux
Due to its reliability and security, the secure socket shell (SSH) is the most common way to interact with a remote server. However, using this...
How to kill a process in Linux from the command line
In Linux, managing running processes can help maintain system health and performance. Sometimes, you might need to terminate a process to free up...
How to use the Linux dig command
The dig command, short for domain information groper, is a powerful network tool for querying domain name system (DNS) servers. It helps diagnose and...
How to use tmux for terminal multitasking
A terminal multiplexer, or tmux, is a command-line tool that lets you manage multiple terminal sessions in a single window. With tmux, you can split...
How to Install and Set Up Ubuntu Mail Server
Having your own email server is a great idea for any medium-sized company. With this, all the traffic is controlled, and we can define the rules...
How to change hostname on CentOS 9 Stream: 3 simple methods explained
Managing multiple servers may be challenging, which is where hostnames can prove to be useful.Hostnames enable users to name their servers and...
How to change a hostname in Linux
A Linux hostname identifies systems within a network, enabling them to identify and communicate with one another correctly. Assigning a unique...
How to List Installed Packages on Ubuntu 2026
As a server administrator, understanding how to list software packages installed in an Ubuntu system is crucial. It is useful for various tasks, such...
How to use the bash for loop: Syntax and examples
A Bash for loop is a statement in the Bash programming language that allows a code or script to run repeatedly. It enables you to finish repetitive...