pwunconv

Revert shadow passwords

$ pwunconv

$ pwunconv -R [/]

pwunconv [options]

pwunconv reverses the shadow password setup by moving password hashes from /etc/shadow back into /etc/passwd and removing the shadow file. This is the inverse of pwconv and effectively disables shadow password protection on the system.
The command is part of shadow-utils and is rarely used in practice since shadow passwords are a fundamental security feature on modern Linux systems. Removing shadow protection makes password hashes readable by all users, significantly weakening system security.

-R ROOT

Chroot directory.

Security risk. Rarely used. Requires root.

pwunconv is part of shadow-utils for reverting shadow passwords.

pwconv(8), grpunconv(8), passwd(5)