How to use it? Read here.

[iM4x1]

Hi, How do I get it to run? need easy tutorial please.

[yzcyayaya]

linux system case:
server:

gcc smallchat.c -o smallchat && ./smallchat

new terminal
client:

nc 127.0.0.1 7711

/nick youname 

[ArjixWasTaken]

Furthermore, a Makefile is at the root of the repo, usually all build/run instructions are there.

In this specific case running make all or make smallchat would build it, you can then run the produced executable like ./smallchat.
To do that ofc you would need make to be installed.

yzcyayaya's answer is already more than enough, but you really should know about Makefiles because they are pretty common.

[JanYork]

There is a Makefile script file, run "all" in the file, then open a terminal and run "smallchat-server", then open another terminal and run "./smallchat-client ", the port is in "smallchat -server" code can be modified, and then Use /nick to set your nick in the client

[windhxs]

you can view content of Makefile in the root path, build target "all" or separately "smallchat-server" and "smallchat-client". You should start server first and select a port, and run multiple clients and see what's happening.

[AsadYuen]

Can it enable two computers to remotely connect and chat（the server opens on one of the computers)？