su

Switch shell to another user. More information: https://manned.org/su.

• Switch to superuser (requires the root password):

su

• Switch to a given user (requires the user’s password):

su {{username}}

• Switch to a given user and simulate a full login shell:

su - {{username}}

• Execute a command as another user:

su - {{username}} {{[-c|--command]}} "{{command}}"