A DNS cache (sometimes called a DNS resolver cache) is a temporary database, maintained by a computer’s operating system, that contains records of all the recent visits and attempted visits to websites and other internet domains. You may want to…
In this tutorial, we’ll learn how to set environment variables in Linux manually. When using Linux, the Kernel sets up the environment with default values for a lot of variables that we would need to use. This includes the default…
Tired of using the same old default hostname that comes with your Ubuntu 18.04 server, and want to change it? And you want to do it now, without having to restart? Oh yes, you can do both!! Let us see…
The kill command in Linux is used to send a signal to a process or a group of processes. The name, unfortunately, chosen as kill, instead of signal, does not need to necessarily kill a process. As we will see,…
The alias command in Linux is used to make a shortcut or an alternative name for an existing command. So instead of re-typing the same commands with all the options over and over again, you can create a shorthand for…
We recently learned about the cat and the more commands in Linux. In this tutorial, we’ll be covering the head command which is pretty similar to the cat command in the essence that it helps you list down the contents…