Mirror Your Remote Server Graphically with Grsync in Ubuntu Linux

rsync is an open source utility that provides fast incremental file transfer.  rsync uses the "rsync algorithm" which provides a very fast method synchronization of  two server.
Grsync is the Graphical Front-end for rsync.
Some features of rsync include

* can update whole directory trees and filesystems
* optionally preserves symbolic links, hard links, file ownership, permissions, devices and times
* requires no special privileges to install
* internal pipelining reduces latency for multiple files
* can use rsh, ssh or direct sockets as the transport
* supports anonymous rsync which is ideal for mirroring

Install grsync in ubuntu
Open a terminal and type

$apt-get install grsync

or use Synaptic package manger

How To hide Apache2 version Information from hackers

Some times we need to hide apache banner information, because hackers check version details, before attacking a sever, If you close this door, it is more difficult for them to exploit any system holes and thus making vulnerability scanners work harder and in some cases impossible without knowing version information.


Do the following steps
Modify /etc/apache2/apache2.conf
Change the ServerSignature on to ServerSignature Off
Change the ServerTokens full to: ServerTokens Prod
Restart Apache: /etc/init.d/apache2 restart

Crack your Wi-Fi WEP and WPA-PSK keys with Aircrack in Ubuntu

Aircrack-ng is an 802.11a/b/g WEP/WPA cracking program that can recover a 40-bit, 104-bit, 256-bit or 512-bit WEP key once enough encrypted packets havebeen gathered. Also it can attack WPA1/2 networks with some advanced methods or simply by brute force.

Howto Install Aircrack-ng in ubuntu

open a terminal and type

$sudo apt-get install aircrack-ng  

or use Synaptic package manager

Howto setup Second IP address or Virtual IP address to your Networkcard in ubuntu

If you are a Network Administrator some time you need to assign more than ONE ip address (second ipaddress) to your network card of Ubuntu machine. For this you need to edit the /etc/network/interfaces file by adding the following lines . See the example below and make change according to your ip address settings

#vi /etc/network/interfaces

auto eth0
iface eth0 inet static
address 192.168.0.5
netmask 255.255.255.0
network x.x.x.x
broadcast x.x.x.x
gateway x.x.x.x

auto eth0:1
iface eth0:1 inet static
address 192.168.0.50
netmask 255.255.255.0
network x.x.x.x
broadcast x.x.x.x
gateway x.x.x.x

after entering the values save this file and you need to restart networking services in ubuntu using the following command to take effect of our new ipaddress.

After entering all the details you need to restart networking services using the following command

#/etc/init.d/networking restart