How to Add or Remove a User from a Group in Linux

Linux is by default a multi-user system (meaning many users can connect to it simultaneously and work), thus user management is one of the fundamental tasks of a system administrator. User management includes everything

How to Append Text to End of File in Linux

While working with configuration files in Linux, sometimes you need to append text such as configuration parameters to an existing file. To append simply means to add text to the end or bottom of