Can't access KALI OS for the first time?

This may happen when you booting the KALI using virtual machine. By default the username and password are set as below:

Name: root
Password: toor

Enjoy!

10 essential application on Ubuntu OS

After install Ubuntu 11.04 or any other version you should first update all the repositories.

After that you may need some of the applications to works on Ubuntu.

1) Compiz
2) VLC media player
3) Openshot
4) Gtkpod
5) K3b
6) Minitube
7) GIMP
8) Inkscape
9) Blender
10) Transmission

There are others useful application too. Always explore! Nice day.