I've always trouble uploading files with Curl. Some how the syntax for that command won't stick, so I post it here for future reference.

What I want to do is perform a normal POST, including a file and some other variables to a remote server. This is it:

curl -i -F name=test -F filedata=@localfile.jpg http://example.org/upload

You can add as many -F as you want. The -i option tells curl to show the response headers as well, which I find useful most of the time.