chmod +x /etc/init.d/cloud-set-guest-password
chkconfig --add cloud-set-guest-password
#ln -s /etc/init.d/cloud-set-guest-password /etc/network/if-up/cloud-set-guest-password #ln -s /etc/init.d/cloud-set-guest-password /etc/network/if-down/cloud-set-guest-password