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    Command:

    groupmems

    
    
    

    SYNOPSIS

           groupmems -a user_name | -d user_name | [-g group_name] | -l | -p
    
    
    

    DESCRIPTION

           The groupmems command allows a user to administer his/her own group
           membership list without the requirement of superuser privileges. The
           groupmems utility is for systems that configure its users to be in
           their own name sake primary group (i.e., guest / guest).
    
           Only the superuser, as administrator, can use groupmems to alter the
           memberships of other groups.
    
    
    

    OPTIONS

           The options which apply to the groupmems command are:
    
           -a, --add user_name
               Add an user to the group membership list.
    
               If the /etc/gshadow file exist, and the group has no entry in the
               /etc/gshadow file, a new entry will be created.
    
           -d, --delete user_name
               Delete a user from the group membership list.
    
               If the /etc/gshadow file exist, the user will be removed from the
               list of members and administrators of the group.
    
               If the /etc/gshadow file exist, and the group has no entry in the
               /etc/gshadow file, a new entry will be created.
    
           -g, --group group_name
               The superuser can specify which group membership list to modify.
    
           -l, --list
               List the group membership list.
    
           -p, --purge
               Purge all users from the group membership list.
    
               If the /etc/gshadow file exist, and the group has no entry in the
               /etc/gshadow file, a new entry will be created.
    
    
    

    SETUP

           The groupmems executable should be in mode 2770 as user root and in
           group groups. The system administrator can add users to group groups to
           allow or disallow them using the groupmems utility to manage their own
           group membership list.
    
                    $ groupadd -r groups
                    $ chmod 2770 groupmems
                    $ chown root.groups groupmems
                    $ groupmems -g groups -a gk4
    
               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.
    
    
    

    FILES

           /etc/group
               Group account information.
    
           /etc/gshadow
               secure group account information
    
    
    

    SEE ALSO

           chfn(1), chsh(1), passwd(1), groupadd(8), groupdel(8), useradd(8),
           userdel(8), usermod(8).
    
    
    

    System Management Commands 07/24/2009 GROUPMEMS(8)

    
    
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