groupadd; man page

Man Pages Index

SYNOPSIS
       groupadd [-g GID [-o]] [-f] [-K KEY=VALUE] group

DESCRIPTION
       The groupadd command creates a new group account using the values
       specified on the command line and the default values from the system.
       The new group will be entered into the system files as needed.

OPTIONS
       The options which apply to the groupadd command are:

       -f This option causes to just exit with success status if the specified
          group already exists. With -g, if specified GID already exists,
          other (unique) GID is chosen (i.e.  -g is turned off).

       -g GID
          The numerical value of the group’s ID. This value must be unique,
          unless the -o option is used. The value must be non-negative. The
          default is to use the smallest ID value greater than 999 and greater
          than every other group. Values between 0 and 999 are typically
          reserved for system accounts.

       -h, --help
          Display help message and exit.

       -K KEY=VALUE
          Overrides /etc/login.defs defaults (GID_MIN, GID_MAX and others).
          Multiple -K options can be specified.

          Example: -K GID_MIN=100
           -K GID_MAX=499

          Note: -K GID_MIN=10,GID_MAX=499 doesn’t work yet.

       -o This option permits to add group with non-unique GID.

FILES
       /etc/group
          Group account information.

       /etc/gshadow
          Secure group account information.

       /etc/login.defs
          Shadow password suite configuration.

CAVEATS
       Groupnames must begin with a lower case letter or an underscore, and
       only lower case letters, underscores, dashes, and dollar signs may
       follow. In regular expression terms: [a-z_][a-z0-9_-]*[$]

       Groupnames may only be up to 16 characters long.

       4  GID not unique (when -o not used)

       9  group name not unique

       10 can’t update group file

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



System Management Commands        07/30/2006                       GROUPADD(8)
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