参考：https://www.cnblogs.com/caoguo/p/4865413.html
#!/usr/bin/expect -f
set TARGET [lindex $argv 0]
set USER [lindex $argv 1]
set PASSWD [lindex $argv 2]
set PORT [lindex $argv 3]
set timeout 10
spawn ssh $USER@$TARGET -p $PORT
expect {
"*yes/no" {send "yes\r"; exp_continue}
"*password:" {send "$PASSWD\r"}
}
interact
写完后chmod +x $脚本
