Method 1: Using the default Software Centre In Ubuntu, the easiest way is to use the default Software Centre. Here you don’t have to do anything special. Just go to the folder where you downloaded the .deb file (it should be the Downloads folder) and double click on this file. Read more…
dpkg is short for Debian package, a package management system developed specifically for the Debian operating system to install, update and remove software. All Linux systems derived from “Debian” use dpkg, for example “Ubuntu”. dpkg [option] <action> Options:-i: Install package-r: Remove package-P: Delete a package with its configuration file-L: Show Read more…
dpkg -l will list information about all installed packages on your system. In combination with grep, you can filter out what you want. e.g. dpkg -l | grep ftp The first column of the output is usually two letters, representing the desired state and the current state respectively. Desired state Read more…