I would like to test if a file has been updated from a website located here:

I-BlockList

Is there anyway to do this from the command line (I'd like to add it to a script). I'd just like to either:

(a) See if the file has been updated by looking at the file's 'Date Modified' or

(b) Compare the file size with one I have downloaded earlier.

Of course the file is located on a remote server so you can't use the usual 'ls' commands, and if you use wget, then you'll download it, which may not be necessary if the file hasn't be updated...

Thanks in advance for your help.

Craig