FTP sharing in Mac OS X; Permission Denied

I went to the sharing control panel and chose the 3rd checkbox for “File Sharing” and then “Share files and folders using FTP”. I then logged into the remote linux box and did an FTP back “ftp 10.10.10.10″ where 10.10.10.10 is my IP… i used my username i log into the mac with (not the linux server) and password. then i did a “put /opt/mydumpfile” but it kept saying “Permission Denied”.. I was thinking i somehow hosed a permission… long story short.. you need to specify both FROM and TO when using PUT with Mac OS X FTP.. when i changed the command to “put /opt/mydumpfile mydumpfile” then it worked like a champ.