自动登录服务器shell脚本

#!/bin/bash

#Description: auto login the Remote Server
#Author:majinxu
#Version:1.0
#CreateTime:2018-3-012 18:34:41

user="zhangsan"
passwd="123456"

host_list=( "st1.qa.bj2.yongche.com"
"st2.qa.bj2.yongche.com"
"st3.qa.bj2.yongche.com"
)

#seletc the host
select host in ${host_list[@]};
do
break
done

#execute the ssh action
expect -c "
spawn ssh $user@$host
expect {
\"yes\/no\" { send \"yes\n\"; exp_continue}
\"password:\" { send \"$passwd\n\" }
}
interact
"

解释：

1. expect -c ： -c参数跟字符串
2. spawn ssh $user@$host 连接服务器
3. expect {
   \"yes\/no\" { send \"yes\n\"; exp_continue}
   \"password:\" { send \"$passwd\n\" }
   }
   输入并接收用户名密码
   是
   "yes/no" { send "yes\n"; exp_continue}
   "password:" { send "$passwd\n" }
   } 转义后的结果
4. interact 执行完成后保持交互状态，把控制权交给控制台