Ubuntu启用Root用户登录SSH

sudo cp /etc/ssh/sshd_config /etc/ssh/sshd_config.bak && sudo sed -i '/^PermitRootLogin/ s/^/#/; /#PermitRootLogin/ s/^.*$/#PermitRootLogin yes/; $aPermitRootLogin yes' /etc/ssh/sshd_config && sudo systemctl restart sshd

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