求助从U主机telnet到Win主机的问题

98019

shell代码如下

1. #!/bin/sh
   
2. (sleep 2;
   
3. echo "imc";
   
4. sleep 3;
   
5. echo "imc";
   
6. sleep 2;
   
7. echo "t"
   
8. ) | telnet 10.214.6.233

复制代码

运行后显示
Trying 10.214.6.233...
Connected to 10.214.6.233.
Escape character is '^]'.
Welcome to Microsoft Telnet Service
login: imcimcConnection closed by foreign host.

233是XP的机子，开启了telnet服务。不知道为什么脚本telnet过来输入用户名后不会回车。
哪位大侠知道是什么原因或者怎么在shell中加入回车吗？