libxi6-dbg software package provides X11 Input extension library (debug package), you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libxi6-dbg
libxi6-dbg is installed in your system.
Make ensure the libxi6-dbg package were installed using the commands given below,
$ sudo dpkg-query -l | grep libxi6-dbg *
You will get with libxi6-dbg package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | libxi6-dbg |
| Version | 2:1.7.1.901-1ubuntu1.1 [amd64, |
| Description | X11 Input extension library (debug package) |
| Sub Section | libdevel |