Stop FTP Server:
sudo launchctl unload /System/Library/LaunchDaemons/ftp.plist
Start FTP Server:
sudo launchctl load /System/Library/LaunchDaemons/ftp.plist
Stop FTP Server:
sudo launchctl unload /System/Library/LaunchDaemons/ftp.plist
Start FTP Server:
sudo launchctl load /System/Library/LaunchDaemons/ftp.plist