Provided by: passwd_4.1.4.2+svn3283-3ubuntu5_i386 bug

CONFIGURATION

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

       MAIL_DIR (string)
            .              .    ,      .

       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 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)
            ,      .      at/cron/   (    ).

           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)
           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.

       /etc/group

       /etc/login.defs

       /etc/passwd

       /etc/shadow

        userdel  ,   :

       0

       1

       2

       6

       8

       10

       12

       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 user.

         NIS   NIS.     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).

                                  04/09/2012                        userdel(8)