libapol4 software package provides Security Enhanced Linux policy analysis library, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libapol4
libapol4 is installed in your system.
Make ensure the libapol4 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libapol4 *
You will get with libapol4 package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Libraries |
| Package | libapol4 |
| Version | 3.3.6.ds-7.2ubuntu4 |
| Description | Security Enhanced Linux policy analysis library |
| Sub Section | libs |