ADDING NEW GROUP WITH GID 600 & MODIFYING GROUP GID

to add new group gid

[root@localhost /]# groupadd -g 600 market

[root@localhost /]# grep market  /etc/group
market:x:600:

 modifying group gid

[root@localhost /]# groupmod -g 640 market

[root@localhost /]# grep market  /etc/group
market:x:640: