rar software package provides Archiver for .rar files, 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 rar
rar is installed in your system.
Make ensure the rar package were installed using the commands given below,
$ sudo dpkg-query -l | grep rar *
You will get with rar package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Utilities |
| Package | rar |
| Version | 2:4.2.0-1 |
| Description | Archiver for .rar files |
| Sub Section | Utils |