这里必须先安装：

yum install expect -y

expect是一种自动交互语言，能实现在shell脚本中为scp和ssh等自动输入密码自动登录。
下面给出scp和ssh的使用示例：

1、scp

[root@BS-WORKERMAN-NFS package]# cat scp.sh 
#!/bin/bash
src=/package
dsc=/root/
for i in {4,5,6}
do
expect -c " spawn scp -r $src/scp.sh root@10.20.18.2$i:$dsc expect { \"*assword\" {set timeout 300; send \"game2017\.\/\r\";} \"yes/no\" {send \"yes\r\"; exp_continue;} } expect eof" 
done

2、ssh

#!/bin/bash
expect -c "
spawn ssh root@192.168.1.204 \"ls;\"
expect {
    \"*assword\" {set timeout 300; send \"password\r\";}
    \"yes/no\" {send \"yes\r\"; exp_continue;}
      }
expect eof"