How to block access to certain Web Sites from your computer.

[fiRepath]

There are many commercial applications that enable you to block access to certain Web sites from your computer.
In this tutorial you will see how to do it in a very simple way, without installing any additional software.
Locate the file hosts in the directory /etc on linux:
We are about to edit the /etc/hosts file.
Note:(for Windows users: C: \WINDOWS\system32\drivers\etc\hosts ).
Run the following command (as root user) to edit the file:

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$ sudo nano /etc/hosts
And bellow the line 127.0.0.1 localhost , enter:

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127.0.0.2 www.facebook.com
Save the file (CTRL + 0 and hit ENTER)
The Website will be no longer available.
Note: For each additional site you wish  to block just add the " 1" from the last number of IP. For example:

127.0.0.3 www.youtube.com
127.0.0.4 www.msn.com

Voila!