Realize a simple LAN communication (similar to feiqiu)

The renderings are as follows :

There is a notice on the upper and lower lines ： go online ：online, Offline ：offline
Enter the corresponding function number to enter the corresponding function
notes ： Exit corresponding function Press exit+ Space
Environmental Science ：ubuntu
Don't talk much , Main engineering documents –>

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https://download.csdn.net/download/dml128/70598174