dpkg tutorial – Package Manager for Ubuntu / Debian

dpkg or the debian package manager is package manager for debian and other debian based Linux distributions like Ubuntu. dpkg can be used for a variety of purposes

1. Installation of packages
2. Removal of packages
3. Knowing the current state of a package
4. Cloning a machine

Let’s see how each of these can be done using dpkg.

1. Package Installation
   1. How to find the installed packages in your Ubuntu machine?
   2. How to see the list of available packages in Ubuntu?
2. Package Removal
   1. dpkg: purge versus remove
   2. Remove all packages marked as rc by dpkg
   3. Purge packages using dpkg
   4. Remove a package marked as rc by dpkg
   5. Remove packages using dpkg
      
3. Package listing (dpkg –list)
   1. What does pn correspond to in dpkg (–list)?
   2. What does ii correspond to in dpkg (–list)?
   3. What does rc correspond to in dpkg (–list)?
4. Package Current State
   1. How to see the Current State of package (Ubuntu)?
   2. How to interpret the status of dpkg (–list)?
5. Cloning a machine
   1. dpkg –set-selections: Clone your Ubuntu Machine (package state)
   2. dpkg –get-selections: Get the Current State of Your Ubuntu/Debian machine

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