lgroupmod (1) Linux Manual Page
lgroupmod – Modify an user group Synopsislgroupmod [OPTION]… group DescriptionModifies the user group with name group. Options-A, –admin-add=list Add users in comma-separated list among group‘s administrators. -a, –admin-remove=list Remove users in comma-separated list from group‘s administrators. Removing users that are not currently among group‘s administrators silently succeeds. -g, –gid=gid Change group‘s group ID to gid….
