# Installing from PPA (Ubuntu Personal Package Archive)

There are PPAs for [SWI-Prolog
stable](https://launchpad.net/~swi-prolog/+archive/stable) and
[SWI-Prolog
development](https://launchpad.net/~swi-prolog/+archive/devel) based on
the official Debian packaging structure and corresponding SWI-Prolog
release. This PPA version can be installed using the commands below in
recent Ubuntu versions.

These PPAs are updated with every new release.  Thanks to Yves Raimond for setting up the PPA snd Eugeniy Meshcheryakov for creating the Debian configuration.  The PPA is registered using `apt-add-repository`, which is by default available on desktops, but not on servers or Linux containers.  It is installed using:

  ==
  % sudo apt-get install software-properties-common
  ==

---+++ Stable versions

  ==
  % sudo apt-add-repository ppa:swi-prolog/stable
  % sudo apt-get update
  % sudo apt-get install swi-prolog
  ==

---+++ Development versions

  ==
  % sudo apt-add-repository ppa:swi-prolog/devel
  % sudo apt-get update
  % sudo apt-get install swi-prolog
  ==