Provided by: passwd_4.1.4.2+svn3283-3ubuntu5_amd64 bug


       userdel - Rimuove l'account di un utente ed i file relativi


       userdel [opzioni] LOGIN


       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.


       Il comando userdel accetta le seguenti opzioni:

       -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
           Mostra un messaggio di aiuto ed esce.

       -r, --remove
           I file nella home directory dell'utente verranno rimossi insieme alla home directory
           stessa. I file collocati in altri file system dovranno essere ricercati e rimossi

           The mail spool is defined by the MAIL_DIR variable in the login.defs file.


       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.

       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.

       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

           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

           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

           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

               # 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.
               find $AT_SPOOL_DIR -name "[^.]*" -type f -user $1 -delete \;

               # Remove print jobs.
               lprm $1

               # All done.
               exit 0

       USERGROUPS_ENAB (boolean)
           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.


           Informazioni sugli account di gruppo.

           Shadow password suite configuration.

           informazioni sugli account utente.

           Informazioni sicure sugli account di utenti.


       The userdel command exits with the following values:


           can't update password file

           sintassi del comando errata

           il gruppo specificato non esiste

           user currently logged in

           non è possibile aggiornare il file group

           can't remove home directory


       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.

       You should manually check all file systems to ensure that no files remain owned by this

       Non è possibile rimuovere nessun attributo NIS su un client NIS. Questo deve essere fatto
       sul server NIS.

       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.


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