How to Install checkpw in Ubuntu 18.04

Install checkpw by entering the following commands in the terminal:

sudo apt update
sudo apt install checkpw


checks password which is stored in ~/Maildir/.password

checkpw is an implementation of the checkpassword interface that checks a password against a ``.password'' file in the user's Maildir. The password file has read and write permissions to the user only. . The code is in the public domain. . The original checkpassword program and interface specification is written by D. J. Bernstein:

Version: 1.02-1.1build1

Section: universe/mail