hostid

[Nicholas Aganan]

I'm really confuse on how host id works on Linux box. I though that hostid is 
derived from the IP address or from /etc/hostid file.

I changed my IP address but my Linux  box keep the old hostid. My new IP 
address is 172.20.68.119 but the hostid is still the same. Where does linux 
keep the hostid information? Where & how can I reset it? 

hostid: 14ac7844
Old IP address: 172.20.68.120


Please help!
Nick