Bash Command Substitution

Internal

• bash

Overview

Command substitution is invoked with:

$(command)

An equivalent, older and obsolete style is:

`command`

Command substitution allows us to take the stdout output of a command or function, which would normally be sent to stdout of the executing shell, and save it as the value of a variable. To do this we place the command or the function within brackets, preceded by a $ sign.

local content
content=$(ps -ef)