A computer-related firewall, whether its composition is hardware or software, has the same basic definition where the term fire refers to a security threat. Firewalls don’t prevent attacks, but mitigate them by only allowing specific ports to be opened to a limited number of hosts inside a network.

Here is a complete tutorial on how to setup Firestarter Firewall in Linux by Ken Hess.

Firestarter How-To

This will replace all occurrences of match_pattern in the file

:g/match_pattern/s//replace_string/g

ex: you want to change all occurrences of an allow rule in your vhost file and comment it out

Allow from 192.168.0.1 to #Allow from 192.168.0.1

:g/Allow from/s//#Allow from/g

This command will find and replace the string that matches the condition.

alternatively, you can use ‘ : ‘ instead of ‘ / ‘ to make path (/) slashes easier to manage (no escape (\) character needed)

:g:match_pattern:s::replace_string:g

This video from TechWebTV shows how water can be used to charge cellphone and laptops using ordinary tap water..

if you are looking for the best firefox wallpaper collection here is the site … Complete Dose of Linux Poison.

Here are some of the samples.