USERDEL(8)

NAME
userdel - löscht ein Benutzerkonto und die dazugehörigen Dateien

ÜBERSICHT

userdel [options] LOGIN

BESCHREIBUNG

The userdel command modifies the system account files, deleting all entries that refer to the user name LOGIN. The named user must exist.

OPTIONEN

The options which apply to the userdel command are:

-f, --force
    This option forces the removal of the user account and any other requested actions, skipping any safety checks.

    Note: This option is dangerous and may leave your system in an inconsistent state.

-h, --help
    zeigt die Hilfe an und beendet das Programm.

-r, --remove
    entfernt das persönliche Verzeichnis des Benutzers mit den darin enthaltenen Dateiein und die Mail-Warteschlange. Dateien in anderen Dateisystemen müssen per Hand gesucht und gelöscht werden.

    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. Only absolute paths are supported. No SELINUX support.

-P, --prefix PREFIX_DIR
    Apply changes in the PREFIX_DIR directory and use the configuration files from the PREFIX_DIR directory. This option does not chroot and is intended for preparing a cross-compilation target. Some limitations: NIS and LDAP users/groups are not verified. PAM authentication is using the host files. No SELINUX support.

-Z, --selinux-user
    entfernt jegliche Zuordnung zu SELinux-Benutzern für das Benutzerkonto.

KONFIGURATION

The following configuration variables in /etc/login.defs change the behavior of this tool:

MAIL_DIR (string)
    The mail spool directory. This is needed to manipulate the mailbox when its corresponding user account is modified or deleted. If not specified, a compile-time default is used. The parameter CREATE_MAIL_SPOOL in /etc/default/useradd determines whether the mail spool should be created.

MAIL_FILE (string)
    Defines the location of the users mail spool files relatively to their home directory.

The MAIL_DIR and MAIL_FILE variables are used by useradd, usermod, and userdel to create, move, or delete the user's mail spool.

If MAIL_CHECK_ENAB is set to yes, they are also used to define the MAIL environment variable.

MAX_MEMBERS_PER_GROUP (number)
    Maximum members per group entry. When the maximum is reached, a new group entry (line) is started in /etc/group (with the same name, same password, and same GID).

    The default value is 0, meaning that there are no limits in the number of members in a group.

    This feature (split group) permits to limit the length of lines in the group file. This is useful to make sure that lines for NIS groups are not larger than 1024 characters.

    If you need to enforce such limit, you can use 25.

    Note: split groups may not be supported by all tools (even in the Shadow toolsuite). You should not use this variable unless you really need it.

USERDEL_CMD (string)
    If defined, this command is run when removing a user. It should remove any at/cron/print jobs etc. owned by the user to be removed (passed as the first argument).

    The return code of the script is not taken into account.

    Here is an example script, which removes the user's cron, at and print jobs:

        #! /bin/sh
        # Check for the required argument.
        if [ $# != 1 ]; then
        	echo "Usage: $0 username"
        	exit 1
        fi
        # Remove cron jobs.
        crontab -r -u $1
        # Remove at jobs.
        # Note that it will remove any jobs owned by the same UID,
        # even if it was shared by a different username.
        AT_SPOOL_DIR=/var/spool/cron/atjobs
        find $AT_SPOOL_DIR -name "[^.]*" -type f -user $1 -delete \;
        # Remove print jobs.
        lprm $1
        # All done.
        exit 0

USERGROUPS_ENAB (boolean)
    Enable setting of the umask group bits to be the same as owner bits (examples: 022 -> 002, 077 -> 007) for non-root users, if the uid is the same as gid, and username is the same as the primary group name.

    If set to yes, userdel will remove the user's group if it contains no more members, and useradd will create by default a group with the name of the user.

DATEIEN

/etc/group
    Informationen zu den Gruppenkonten

/etc/login.defs
    konfiguriert die Shadow-Hilfsprogramme.

/etc/passwd
    Informationen zu den Benutzerkonten

/etc/shadow
    geschützte Informationen zu den Benutzerkonten

/etc/shadow-maint/userdel-pre.d/*, /etc/shadow-maint/userdel-post.d/*
    Run-part files to execute during user deletion. The environment variable ACTION will be populated with userdel and SUBJECT with the username. userdel-pre.d will be executed prior to any user deletion. userdel-post.d will execute after user deletion. If a script exits non-zero then execution will terminate.

/etc/subgid
    enthält untergeordnete Gruppenkennungen der einzelnen Benutzer.

/etc/subuid
    enthält untergeordnete Benutzerkennungen der einzelnen Benutzer.

RÜCKGABEWERTE

The userdel command exits with the following values:

0
    success

1
    can't update password file

2
    invalid command syntax

6
    specified user doesn't exist

8
    user currently logged in

10
    can't update group file

12
    can't remove home directory

WARNUNGEN

userdel will not allow you to remove an account if there are running processes which belong to this account. In that case, you may have to kill those processes or lock the user's password or account and remove the account later. The -f option can force the deletion of this account.

Sie sollten von Hand alle Dateisysteme in Hinblick auf Dateien dieses Benutzers prüfen und sie gegebenenfalls löschen.

Sie dürfen keine NIS-Attribute auf einem NIS-Client löschen. Dies muss auf dem NIS-Server durchgeführt werden.

If USERGROUPS_ENAB is defined to yes in /etc/login.defs, userdel will delete the group with the same name as the user. To avoid inconsistencies in the passwd and group databases, userdel will check that this group is not used as a primary group for another user, and will just warn without deleting the group otherwise. The -f option can force the deletion of this group.

SIEHE AUCH

chfn(1), chsh(1), passwd(1), login.defs(5), gpasswd(8), groupadd(8), groupdel(8), groupmod(8), subgid(5), subuid(5), useradd(8), usermod(8).