Become superuser.
Change the system's host name in the following files:
/etc/nodename
/etc/hostname.xxy(For Ex: /etc/hostname.hme0)
/etc/inet/hosts
/etc/net/ticlts/hosts
/etc/net/ticots/hosts
/etc/net/ticotsord/hosts
(Optional)
If using a name service, change the system's host name in the hostfile.
Reboot the system to activate the new host name.(init 6)