Hostname keeps on changing

#! /bin/sh
### BEGIN INIT INFO
# Provides:          hostname
# Required-Start:
# Required-Stop:
# Should-Start:      glibc
# Default-Start:     S
# Default-Stop:
# Short-Description: Set hostname based on /etc/hostname
# Description:       Read the machines hostname from /etc/hostname, and
#                    update the kernel value with this value.  If
#                    /etc/hostname is empty, the current kernel value
#                    for hostname is used.  If the kernel value is
#                    empty, the value 'localhost' is used.
### END INIT INFO


PATH=/sbin:/bin


. /lib/init/vars.sh
. /lib/lsb/init-functions


do_start () {
<------>[ -f /etc/hostname ] && HOSTNAME="$(cat /etc/hostname)"


<------># Keep current name if /etc/hostname is missing.
<------>[ -z "$HOSTNAME" ] && HOSTNAME="$(hostname)"


<------># And set it to 'localhost' if no setting was found
<------>[ -z "$HOSTNAME" ] && HOSTNAME=localhost


<------>[ "$VERBOSE" != no ] && log_action_begin_msg "Setting hostname to '$HOSTNAME'"
<------>hostname "$HOSTNAME"
<------>ES=$?
<------>[ "$VERBOSE" != no ] && log_action_end_msg $ES
<------>exit $ES
}


do_status () {
<------>HOSTNAME=$(hostname)
<------>if [ "$HOSTNAME" ] ; then
<------><------>return 0
<------>else
<------><------>return 4
<------>fi
}


case "$1" in
  start|"")
<------>do_start
<------>;;
  restart|reload|force-reload)
<------>echo "Error: argument '$1' not supported" >&2
<------>exit 3
<------>;;
  stop)
<------># No-op
<------>;;
  status)
<------>do_status
<------>exit $?
<------>;;
  *)
<------>echo "Usage: hostname.sh [start|stop]" >&2
<------>exit 3
<------>;;
esac


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