bash software package provides GNU Bourne Again SHell, 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 bash
bash is installed in your system.
Make ensure the bash package were installed using the commands given below,
$ sudo dpkg-query -l | grep bash *
You will get with bash package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Shells |
| Package | bash |
| Version | 4.3-7ubuntu1.5 [amd64, i386], |
| Description | GNU Bourne Again SHell |
| Sub Section | Shells |