Add plain FTP server in Debian
$> sudo apt-get install proftpd $> sudo adduser <username>
That's it! Now all users will have FTP access to their home directory.
This represents a security risk. It is better to use SSH. But in some case you need a plain FTP.
For example to upload on movement detection with Amcrest security IP camera which only supports plain FTP servers.
Trading security for security...