Editing Environment variable (section)

=== Unix ===
In most Unix and Unix-like [[command-line shell]]s, an environment variable's value is retrieved by placing a <code>$</code> sign before the variable's name. If necessary, the name can also be surrounded by braces.

To display the user home directory, the user may type:

<syntaxhighlight lang="bash">
echo $HOME
</syntaxhighlight>

In Unix and Unix-like systems, the names of environment variables are case-sensitive.

The command '''<code>[[env (shell)|env]]</code>''' displays all environment variables and their values. The command '''<code>printenv</code>''' can also be used to print a single variable by giving that variable name as the sole argument to the command.