Linux Troubleshooting Make Easy.

Linux Learning & Troubleshooting Make Easy.

Group add/delete in Linux

groupadd - Create a new group
groupdel - Delete a group 

DESCRIPTION:

The groupdel command modifies the system account files, deleting all entries that refer to group. The named group must exist. You must manually check all filesystems to insure that no files remain with the named group as the file group ID.

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.
 



The options which apply to the groupadd command are :

-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 500 and greater than every other group.

-r
    This flag instructs groupadd to add a system account. The first available gid lower than 499 will be automatically selected unless the -g option is also given on the command line.

-f
    This is the force flag. This will cause groupadd to exit with an error when the group about to be added already exists on the system. If that is the case, the group won't be altered (or added again).
   

Example:

#  groupadd -g 555 admin
#  groupdel admin


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