# The Environment#

Command

Action

set

Change shell options

export

Create an environment variables

alias

Create an alias for a command

printenv

Print environment variables

## Create an Environment Variable#

Environment variables are passed from parent to child process. They’re created using export.

## Special Environment Variables#

Some environment variables have a special meaning. Of them $PATH is the most important. $PATH is a list of directories where the shell searches for commands.