deluser

Delete a user from the system. More information: https://manpages.debian.org/latest/adduser/deluser.html.

Remove a user:

sudo deluser {{username}}

Remove a user and their home directory:

sudo deluser --remove-home {{username}}

Remove a user and their home, but backup their files into a .tar.gz file in the specified directory:

sudo deluser --backup-to {{path/to/backup_directory}} --remove-home {{username}}

Remove a user, and all files owned by them:

sudo deluser --remove-all-files {{username}}