Command aliases

alias [command_alias]='[command]' -> create an alias for a defined command

$ alias ll='ls -lh'

In this example the command is being created ll what will execute ls -lh

Anything added after the alias is automatically added after the command

$ ll -a
$ ls -lh -a

In the example, 2 commands do the same

Every time we open the terminal a program called .bash_profile which is a series of commands that register some variables

In .bash_profile aliases are saved