```bash #!/bin/env bash ##this is ssh_config scripts ##author xw 2018.3.26 for ip in `cat passwd.txt` ##这个文件定义为那些主机做命令 do { ssh $ip "sed -ri '/^#UseDNS/c\UseDNS no' /etc/ssh/sshd_config" ssh $ip "sed -ri '/GSSAPIAuthentication yes/c\GSSAPIAuthentication no' /etc/ssh/sshd_config" ssh $ip "sed -ri '/^#AuthorizedKeysFile/c\AuthorizedKeysFile' /etc/ssh/sshd_config" ssh $ip "/etc/init.d/iptables stop; chkconfig iptables off" ssh $ip "setenforce 0" ssh $ip "sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config" }& done wait ```