adding users to groups in with in console
 

Hi, need to add some users to groups have no Xserver on server so if any1 could help me that would be gr8

The commands useradd, userdel, usermod, groupadd, groupdel and groupmod should help. All have manual pages on major distros.

at /etc/groups, add the username of the groups your want(on the right most part).

Another useful command for adding users to groups is gpasswd. Read the manual for the detailed instructions on how to use the command.