Steps to change the hostname on HP-UX:

1. #hostname newname

2. # uname –S newname ( Ths is to change the node name)

3. # vi /etc/rc.config.d/netconf

HOSTNAME="newname"

4. # /sbin/init.d/net stop
# /sbin/init.d/net start

5. Now u can check the hostname

# uname -a
or
# hostname