bash software package provides GNU Bourne Again SHell, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) 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 16 04 lts xenial xerus |
| Section | Shells |
| Package | bash |
| Version | 4.3-14ubuntu1 |
| Description | GNU Bourne Again SHell |
| Sub Section | Shells |