多台LINUX主机SSH登录密钥认证的配置

首先在服务器上生成密钥，ssh-keygen -t rsa，输入密码等，或留空，例如生成了/root/.ssh/id_rsa_cenosb.pub文件

将要SSH远程连接的所有主机的IP,用户名，密码写在同一目录的pwd.txt,以空格作为分隔符，搞定以后可以删除

脚本如下

#!/bin/bash

a=`cat /root/.ssh/id_rsa_cenosb.pub`

cat pwd.txt | while read line

do

hostip=`echo $line | cut -d" " -f1`

uname=`echo $line | cut -d" " -f2`

pwd=`echo $line | cut -d" " -f3`

/usr/bin/expect <<-EOF

 set time 30

 spawn ssh $uname@$hostip

 expect {

 "*yes/no" { send "yes\r"; exp_continue }

"*password:" { send "$pwd\r" }

}

expect "*#"

send "echo $a >> /root/.ssh/authorized_keys\r"

expect "*#"

send "exit\r"

interact

expect eof

EOF

#echo "$pwd"

done