edit /etc/dhcp/dhclient-exit-hooks.d/hostname #!/bin/sh# dhclient change hostname script for Ubuntu# /etc/dhcp/dhclient-exit-hooks.d/sethostname# logs in /var/log/upstart/network-interface-eth0.log # for debugging:echo "sethostname BEGIN"exportset -x if [ $reason = "BOUND" ]; then echo new_ip_address=$new_ip_address echo new_host_name=$new_host_name echo new_domain_name=$new_domain_name oldhostn..