Package: libx11-6 Priority: important Version: 1.1.6-1 Source: libX11 Architecture: __ARCH__ Maintainer: Paul A. Whittaker Section: Libraries/X11 Destination: usr Depends: libxdmcp6, libxau6, libc6 (>= 2.7-1) Description: Essential infrastructure for all X11 applications You need this package in order to run any kind of X11 application (including an X11 server). However, if you're planning on displaying the application locally, you'll need an X11 server also. . The package consists of Xlib (libX11) and related data files, including bare minimum internationalisation data.