How does FTP work

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I want to make my own ftp server software. I know, there are many ftp servers ready to install that have many features, but I still want to make my own, cause I can customize it and make it the way I want. Also, I find it fun to code, and I would rather make my own FTP server instead of downloading one that is ready to use if I have time. The problem is I can't find any information on how the protocol works and stuff like that. I would appreciate it if someone could explain how the protocol works or at least send me to a page that has useful information. Thanks!

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nabuchodonossor On

If you are curious about beeing downvoted, here the explanation:

When planning a homebrew ftp program, it is a good point to google about FTP. Soon you will find RFC`S (that is "Request For Comment"), where things like the FTP protocol are described.

Thats a good starting point.

Then, when you have troubles with specific points, come back, show your code here, and ask for help.