expect脚本免密码

   #!/usr/bin/expect
   set timeout
   spawn ssh root@20.0.102.19
   expect "password:"
   send "123456\n"
   interact 

   #!/usr/bin/expect
   set timeout
   spawn scp -r /root/authorized_keys root@20.0.102.19:/root/.ssh/authorized_keys  
    #将本地的authorized_keys拷贝到远端的/root/.ssh

 expect "password:"
   send "123456\n"
   interact

今天要用expect免密码登陆集群中节点，使用expect实现免密码登陆和scp.