userdel

Remove a user account or remove a user from a group. See also: users, useradd, usermod. More information: https://manned.org/userdel.

Remove a user:

sudo userdel {{username}}

Remove a user in other root directory:

sudo userdel --root {{path/to/other/root}} {{username}}

Remove a user along with the home directory and mail spool:

sudo userdel --remove {{username}}