keychain software package provides key manager for OpenSSH, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install keychain
keychain is installed in your system.
Make ensure the keychain package were installed using the commands given below,
$ sudo dpkg-query -l | grep keychain *
You will get with keychain package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Network |
| Package | keychain |
| Version | 2.7.1-1 |
| Description | key manager for OpenSSH |
| Sub Section | Net |