#!/bin/bash sed -i 's/#PermitRootLogin yes/PermitRootLogin yes/g' /etc/ssh/sshd_config sed -i 's/#UseDNS yes/UseDNS no/g' /etc/ssh/sshd_config sed -i 's/GSSAPIAuthentication yes/GSSAPIAuthentication no/g' /etc/ssh/sshd_config systemctl restart sshd