checkpw software package provides checks password which is stored in ~/Maildir/.password, 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 checkpw
checkpw is installed in your system.
Make ensure the checkpw package were installed using the commands given below,
$ sudo dpkg-query -l | grep checkpw *
You will get with checkpw package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | |
| Package | checkpw |
| Version | 1.02-1.1 |
| Description | checks password which is stored in ~/Maildir/.password |
| Sub Section |