]> Julianne Frances Haugh Creation, 1991 Thomas Kłoczko kloczek@pld.org.pl shadow-utils maintainer, 2000 - 2007 Nicolas François nicolas.francois@centraliens.net shadow-utils maintainer, 2007 - now userdel 8 System Management Commands shadow-utils &SHADOW_UTILS_VERSION; userdel delete a user account and related files userdel options LOGIN The userdel command modifies the system account files, deleting all entries that refer to the user name LOGIN. The named user must exist. 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. Only absolute paths are supported. -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 Remove any SELinux user mapping for the user's login. The following configuration variables in /etc/login.defs change the behavior of this tool: &MAIL_DIR; &MAX_MEMBERS_PER_GROUP; &TCB_SYMLINKS; &USE_TCB; &USERDEL_CMD; &USERGROUPS_ENAB; /etc/group Group account information. /etc/login.defs Shadow password suite configuration. /etc/passwd User account information. /etc/shadow Secure user account information. /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 Per user subordinate group IDs. /etc/subuid Per user subordinate user IDs. 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 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. You may not remove any NIS attributes on a NIS client. This must be performed on the NIS server. 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. chfn1 , chsh1 , passwd1 , login.defs5 , gpasswd8 , groupadd8 , groupdel8 , groupmod8 , subgid5 , subuid5 , useradd8 , usermod8 .