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


       usermod - zmiana danych konta użytkownika


       usermod [opcje] LOGIN


       Polecenie usermod zmienia systemowe pliki kont, odzwierciedlając zmiany podane w wierszu


       Polecenie usermod posiada następujące opcje:

       -a, --all
           Add the user to the supplementary group(s). Use only with the -G option.

       -c, --commentKOMENTARZ
           Nowa wartość pola komentarza dla danego użytkownika w pliku haseł. Zwykle jest
           zmieniana przy pomocy polecenia chfn(1).

       -d, --homeKAT_DOMOWY
           The user's new login directory.

           If the -m option is given, the contents of the current home directory will be moved to
           the new home directory, which is created if it does not already exist.

       -e, --expiredateDATA_WAŻN
           Data, od której konto danego użytkownika zostanie wyłączone. Data podawana jest w
           formacie MM/DD/RR.

       -f, --inactiveNIEAKTYWNE
           The number of days after a password expires until the account is permanently disabled.

           A value of 0 disables the account as soon as the password has expired, and a value of
           -1 disables the feature.

       -g, --gidGRUPA
           The group name or number of the user's new initial login group. The group must exist.

           Any file from the user's home directory owned by the previous primary group of the
           user will be owned by this new group.

           The group ownership of files outside of the user's home directory must be fixed

       -G, --groupsGRUPA1[,GRUPA2,...[,GRUPAN]]]
           A list of supplementary groups which the user is also a member of. Each group is
           separated from the next by a comma, with no intervening whitespace. The groups are
           subject to the same restrictions as the group given with the -g option.

           If the user is currently a member of a group which is not listed, the user will be
           removed from the group. This behaviour can be changed via the -a option, which appends
           the user to the current supplementary group list.

       -l, --loginNOWY_LOGIN
           The name of the user will be changed from LOGIN to NEW_LOGIN. Nothing else is changed.
           In particular, the user's home directory name should probably be changed manually to
           reflect the new login name.

       -L, --lock
           Zablokuj hasło użytkownika. Opcja ta powoduje wstawienie ’!’ na początku zakodowanego
           hasła. Opcji tej nie można używać z opcjami -p or -U.

           Note: if you wish to lock the account (not only access with a password), you should
           also set the EXPIRE_DATE to 1.

       -m, --move-home
           Move the content of the user's home directory to the new location.

           This option is only valid in combination with the -d (or --home) option.

           usermod will try to adapt the ownership of the files and to copy the modes, ACL and
           extended attributes, but manual changes might be needed afterwards.

       -o, --non-unique
           When used with the -u option, this option allows to change the user ID to a non-unique

       -p, --passwordHASŁO
           The encrypted password, as returned by crypt(3).

           Note: This option is not recommended because the password (or encrypted password) will
           be visible by users listing the processes.

           The password will be written in the local /etc/passwd or /etc/shadow file. This might
           differ from the password database configured in your PAM configuration.

           You should make sure the password respects the system's password policy.

       -s, --shellSHELL
           Nazwa nowej powłoki (shell) użytkownika. Ustawienie tego pola na puste powoduje, że
           system wybierze domyślną powłokę logowania.

       -u, --uidUID
           The new numerical value of the user's ID.

           This value must be unique, unless the -o option is used. The value must be
           non-negative. Values between 0 and 999 are typically reserved for system accounts.

           The user's mailbox, and any files which the user owns and which are located in the
           user's home directory will have the file user ID changed automatically.

           The ownership of files outside of the user's home directory must be fixed manually.

       -U, --unlock
           Odblokowuje hasło użytkownika. Opcja ta powoduje usuniecie ’!’ z początku zakodowanego
           hasła. Opcji tej nie można używać z opcjami -p lub -L.

           Note: if you wish to unlock the account (not only access with a password), you should
           also set the EXPIRE_DATE (for example to 99999, or to the EXPIRE value from

       -Z, --selinux-user SEUSER
           The SELinux user for the user's login. The default is to leave this field the blank,
           which causes the system to select the default SELinux user.


       You must make certain that the named user is not executing any processes when this command
       is being executed if the user's numerical user ID, the user's name, or the user's home
       directory is being changed.  usermod checks this on Linux, but only check if the user is
       logged in according to utmp on other architectures.

       You must change the owner of any crontab files or at jobs manually.

       You must make any changes involving NIS on the NIS server.


       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.


           Informacje o grupach użytkowników.

           Informacje chronione o grupach użytkowników.

           Informacja o kontach użytkowników.

           Informacje chronione o użytkownikach.


       chfn(1), chsh(1), passwd(1), crypt(3), gpasswd(8), groupadd(8), groupdel(8), groupmod(8),
       login.defs(5), useradd(8), userdel(8).