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.

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.

Starting SSH service 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: