#!/bin/bash
# This script is to update hostname of the system.

if [ "$reason" != BOUND ] && [ "$reason" != RENEW ] \
     && [ "$reason" != REBIND ] && [ "$reason" != REBOOT ]
then
    exit 0
fi

current_host_name=`hostname -s`

if [ "$current_host_name" != "$new_host_name" ]
then
    echo $new_host_name > /etc/hostname
    line_to_replace=`grep 127.0.0.1.*$current_host_name /etc/hosts`
    new_line=`echo $line_to_replace | sed "s/$current_host_name/$new_host_name/"`
    sed -i "s/$line_to_replace/$new_line/" /etc/hosts

    hostname -F /etc/hostname
fi