Bash provides a way to create functions, groups of commands that can be set up inside a script and invoked as a group. Functions can therefore be run as often or as infrequently as needed.

Bash functions can group related commands in Linux and run them as frequently or infrequently as needed. They can also make scripts more readable by organizing commands by the roles they play.

We often read (including in the book Advanced Bash-Scripting Guide by Mendel Cooper) that if we pass variable names as parameters to functions, they will be treated as string literals and cannot be ...

Each of the four numbers has a valid range of 0 to 255. The following bash script contains a bash function which returns true if it is passed a valid IP address and false otherwise. In bash speak true ...

It is easy to dismiss bash — the typical Linux shell program — as just a command prompt that allows scripting. Bash, however, is a full-blown programming language. I wouldn’t presume to tell ...