Block unwanted advertisements with /etc/hosts file on Linux

Now we will make the shell script.
run:

vi /root/update_hosts.sh

Fill the file with the following:
 

#!/bin/bash
cd /tmp
wget http://winhelp2002.mvps.org/hosts.txt
rm /etc/hosts
mv hosts.txt /etc/hosts
cat ~/.etchosts >> /etc/hosts

Now we have to make sure the script is executable: 

chmod +x update_hosts.sh
./update_hosts.sh

For Windows check this : http://winhelp2002.mvps.org/