Lets get started

1.ubuntu software center

By installing Ubuntu software center its easy to install all popular software like VLC, chromium browser ect .... in backtrack from ubuntu software center

its so simple to install just in some mouse clicks

coding to install 

# apt-get install software-center

after a few seconds it will install in your backtrack

to see it go to APPLICATIONS in bottom of it you can see it

2.How to change root password??

As you know Backtrack comes with a default username and password (root/toor) it is IMPORTANT that we change that root password especially when running services such as SSH. We can change the password by issuing the passwd command:

Codings 

# passwd

3.Starting services

BackTrack has various services such as Apache, SSH, MySQL, VNC, etc. They are all disabled by default. To start a service such as SSH, you can use the service init scripts. For example, to start the SSH service:

Codings

root@bt:~# sshd-generate # Specific to the SSH service – needed to generate SSH keys
root@bt:~# /etc/init.d/ssh start
Starting OpenBSD Secure Shell server: sshd.
root@bt:~# /etc/init.d/ssh stop
Stopping OpenBSD Secure Shell server: sshd.
root@bt:~#
When using a ssh server for the first time on Backtrack you will need to generate keys:
root@bt:~# sshd-generate
To enable a service at boot time, you can use the update-rc.d command, for example, having SSH start at boot time:
root@bt:~# update-rc.d -f ssh defaults
Adding system startup for /etc/init.d/ssh …
/etc/rc0.d/K20ssh -> ../init.d/ssh
/etc/rc1.d/K20ssh -> ../init.d/ssh
/etc/rc6.d/K20ssh -> ../init.d/ssh
/etc/rc2.d/S20ssh -> ../init.d/ssh
/etc/rc3.d/S20ssh -> ../init.d/ssh
/etc/rc4.d/S20ssh -> ../init.d/ssh
/etc/rc5.d/S20ssh -> ../init.d/ssh
root@bt:~#

4.Common " apt " commands

apt-get install <package> Downloads <package> and all of its dependencies, and installs or upgrades them.

apt-get remove [--purge] <package> Removes <package> and any packages that depend on it. --purge specifies that packages should be purged.

apt-get update Updates packages listings from the repo, should be run at least once a week.

apt-get upgrade Upgrades all currently installed packages with those updates available from the repo. should be run once a week.

apt-get dist-upgrade [-u] Similar to apt-get upgrade, except that dist-upgrade will install or remove packages to satisfy dependencies.

apt-cache search <pattern> Searches packages and descriptions for <pattern>.

apt-cache show <package> Shows the full description of <package>.

apt-cache showpkg <package> Shows a lot more detail about <package>, and its relationships to other packages.

man apt Will give you more info on these commands as well as many that are in less common usage.

5.Common " dpkg " commands

dpkg -i <package.deb> Installs a package file; one that you downloaded manually, for example.

dpkg -c <package.deb> Lists the contents of <package.deb> a .deb file.

dpkg -I <package.deb> Extracts package information from <package.deb> a .deb file.

dpkg -r <package> Removes an installed package named <package>

dpkg -P <package> Purges an installed package named <package>. The difference between remove and purge is that while remove only deletes data and executables, purge also deletes all configuration files in addition.

dpkg -L <package> Gives a listing of all the files installed by <package>. See also dpkg -c for checking the contents of a .deb file.

dpkg -s <package> Shows information on the installed package <package>. See also apt-cache show for viewing package information in the Debian archive and dpkg -I for viewing package information extracted from a .deb file.

dpkg-reconfigure <package> Reconfigures an installed package

man dpkg Will give you more info on these commands as well as many that are in less common usage.

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