Linux - Change hosts file automatically depending on WiFi

02updatehosts

#!/bin/sh 
# Script to change hosts file when your router does not allow ip loopback
#
# Save it in /etc/NetworkManager/dispatcher.d

wifi=`iwgetid -r`;

if [ $wifi = 'ESSID_WIFI' ];
then
    cat /etc/hosts.common /etc/hosts.in > /etc/hosts
else
    cat /etc/hosts.common /etc/hosts.out > /etc/hosts
fi

hosts.common

127.0.0.1	localhost
127.0.1.1	my-laptop

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

hosts.in

# Host LAN
192.168.1.5 	server.domain.com