Install crack-common by entering the following commands in the terminal:
sudo apt update sudo apt install crack-common
Description:
Password guessing program (common files of all variants)
Crack is program designed to quickly locate vulnerabilities in Unix (or other) password files by scanning the contents of a password file, looking for users who have misguidedly chosen a weak login password. . This package provides the common files for the crypt() and MD5 versions.
Homepage: http://www.crypticide.com/alecm/software/crack/
Version: 5.0a-11build1
Section: universe/admin