dpkg -l |grep liballegro
ii liballegro-doc 2:4.2.2-2 documentation for the Allegro library
ii liballegro4.2 2:4.2.2-2 portable library for cross-platform game and
ii liballegro4.2-dev 2:4.2.2-2 development files for the Allegro library
ii liballegro4.2-plugin-arts 2:4.2.2-2 aRts audio plugin for the Allegro library
ii liballegro4.2-plugin-esd 2:4.2.2-2 esd audio plugin for the Allegro library
ii liballegro4.2-plugin-jack 2:4.2.2-2 JACK audio plugin for the Allegro library
ii liballegro4.2-plugin-svgalib 2:4.2.2-2 SVGAlib video plugin for the Allegro library