curl -T uploadfilename -u username:password ftp://sitename.com/myfile

The ‘uploadfilename’ file will be copied to the remote site and named ‘myfile’. If the destination filename is eliminated the file will be copied with the original name. By default the file will be copied to the root directory.

To copy to some other directory specify the directory after the site name;e.g.

curl -T uploadfilename -u username:password ftp://sitename.com/directory/myfile