Meinst du einen ganz normalen User ? Denke mal mit "deluser" oder "userdel"
USERDEL(8) System Management Commands USERDEL(8)
NAME
userdel - delete a user account and related files
SYNOPSIS
userdel [options] LOGIN
DESCRIPTION
userdel is a low level utility for removing users. On Debian, administrators should usually use deluser(8) instead.
The userdel command modifies the system account files, deleting all entries that refer to the user name LOGIN. The named user
must exist.
OPTIONS
The options which apply to the userdel command are:
-f, --force
This option forces the removal of the user account, even if the user is still logged in. It also forces userdel to remove
the user's home directory and mail spool, even if another user uses the same home directory or if the mail spool is not
owned by the specified user. If USERGROUPS_ENAB is defined to yes in /etc/login.defs and if a group exists with the same
name as the deleted user, then this group will be removed, even if it is still the primary group of another user.
Note: This option is dangerous and may leave your system in an inconsistent state.
-h, --help
Display help message and exit.
-r, --remove
Files in the user's home directory will be removed along with the home directory itself and the user's mail spool. Files
located in other file systems will have to be searched for and deleted manually.
The mail spool is defined by the MAIL_DIR variable in the login.defs file.
-R, --root CHROOT_DIR
Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.
-Z, --selinux-user
Remove any SELinux user mapping for the user's login.danke habt mir sehr geholfen 
