Useful for generating passwords for /etc/shadow and for use in Ansible playbooks.

• Install mkpasswd which is included in the whois package:

  sudo apt install whois

• Encrypt a string as a SHA-512 password:

  mkpasswd --method=sha-512

• Encrypt a string as a yescrypt password:

  mkpasswd --method=yescrypt

• https://packages.debian.org/bullseye/whois
• https://manpages.debian.org/bullseye/whois/mkpasswd.1.en.html
• https://www.debian.org/releases/bullseye/amd64/release-notes/ch-information.en.html#pam-default-password