ksh software package provides Real, AT&T version of the Korn 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 ksh
ksh is installed in your system.
Make ensure the ksh package were installed using the commands given below,
$ sudo dpkg-query -l | grep ksh *
You will get with ksh package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Shells |
| Package | ksh |
| Version | 93u+20120801-1 |
| Description | Real, AT&T version of the Korn shell |
| Sub Section | Shells |