Howto Crack Compress Zip Files Password in Linux

to crack zip file passwords use fcrackzip.fcrackzip is a fast password cracker partly written in assembler. It is able to crack password protected zip files with brute force or dictionary based attacks, optionally testing with unzip its results.
Install fcrackzip in Ubuntu
sudo aptitude install fcrackzip
This will complete the installation.
Fcrack Syntax
fcrackzip [-bDBchVvplum2] [--brute-force] [--dictionary] [--benchmark] [--charset characterset] [...]

Howto Setup DHCP Server & Dynamic DNS with BIND in Debian

Preparing you system
First you need to install DHCP,BIND servers using the following command
#aptitude install dhcp3-server bind9
This will complete the installation.
This is the network configuration of our DHCP/DNS server we are using for our tutorial
Hostname : router.static.example.org
WAN interface (eth0) : 192.168.99.254 mask 255.255.255.0
LAN interface (eth1) : 172.30.200.254 mask 255.255.0.0
Default gateway : 192.168.99.1
First, we need [...]

How to protect Web Server Apache from DOS, DDOS or brute force attacks

To protect apache webserver against DOS,DDOS or brute force attacks use mod_evasive module.mod_evasive is an evasive maneuvers module for Apache to provide evasive action in the event of an HTTP DoS or DDoS attack or brute force attack. It is also designed to be a detection and network management tool, and can be easily configured [...]

howto upgrade ubuntu 8.10 to ubuntu 9.04 (Jaunty Jackalope)

to upgrade ubuntu desktop 8:10 to ubuntu 9:04 can be done by the following steps:
1. open the console by pressing alt + F2
2. type the command
update-manager-d
update manager will notify the latest release of ubuntu 9:04. then click on the upgrade and follow the instructions on the screen
and for ubuntu server 8.10 can be done by [...]