lame software package provides MP3 encoding library (frontend), 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 lame
lame is installed in your system.
Make ensure the lame package were installed using the commands given below,
$ sudo dpkg-query -l | grep lame *
You will get with lame package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Sound |
| Package | lame |
| Version | 3.99.5+repack1-3ubuntu1 |
| Description | MP3 encoding library (frontend) |
| Sub Section | Sound |