Shulou(Shulou.com)06/03 Report--

1. Sshd does not allow empty passwords to log in by default.

Set PermitEmptyPasswords yes # to allow an empty password to log in

Systemctl restart sshd

Delete the user's password

Passwd-d root

Check whether the user (root) is a space password

Passwd-S root

Or users with all empty passwords of the system:

Awk-F':'{if ($2 million = ") print $0}'/ etc/shadow

# the result will be displayed as Empty password,

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