如下示例代码实现了用telnet命令测试端口连通性的功能：
端口通信正常
-bash-4.1$ echo " " | telnet 192.0.0.1 10100
Trying 10.71.133.9...Connected to 10.71.133.[......]如下示例代码实现了用telnet命令测试端口连通性的功能：
端口通信正常
-bash-4.1$ echo " " | telnet 192.0.0.1 10100
Trying 10.71.133.9...Connected to 10.71.133.[......]