Linux Group Commands
Manage group accounts and group membership in the Linux operating system.
Function
Flags
groupadd Creates a new group. -g (Defines the group ID)
-p (Defines the group password)
-r (Makes the new group a system group)
groupmod
Modifies the existing group.groupdel Modifies the system account files by deleting all entries that refer to the specified group.
gpasswd Changes a group password. -r (Removes a group password) newgrp Used to change the current group IP during a login session.
usermod Modifies group membership for the user account.
-g (Assigns a user to a primary group)
-G (Assigns a user to a secondary group)
-aG (Assigns a user to a secondary group by adding it to the list of secondary users)
-G "" (Removes the user from all secondary group memberships)
groups Displays the primary and secondary group membership for the specified user account.