From Raspberry Pi Spy:
Although FTP (File Transfer Protocol) is an old technology it is still used by lots of systems and hardware devices. Some IP cameras allow you to save photos to an FTP server and you can create one using a Raspberry Pi. If you’ve got the choice you would be better using SFTP but if your device only supports FTP then this guide will help you create an FTP server.
We will use vsftpd as it is a popular Linux appication that is secure, stable and extremely fast.
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