Files to edit/change hostname manually
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/etc/hosts
/etc/nodename
/etc/hostname.xxn (xxn = network interface, such as hme0)
/etc/net/ticlts/hosts
/etc/net/ticots/hosts
/etc/net/ticotsord/hosts
/etc/inet/ipnodes (if file exists and if hostname entry exists)

Files to edit/change the IP manually
------------------------------------
/etc/hosts 
/etc/defaultrouter 
/etc/netmasks