This is with reference to FAQ #1 - How do I know my blog is being cached?
Just now checked if caching is working on my server from command line (Terminal on Mac) using CURL like below....
curl http://example.com/post/ | tail -n 3
Just replace "http://example.com/post/" with your blog/post URL.
You can simply run above command 2-3 times and compare timestamp from line
"<!-- Cached page generated by WP-Super-Cache on .... -->"
All from single screen with least typing work. ;-)
I also felt with wp-super-cache working whole command got executed a lot faster. :-)
Really felt this way is easier for mac/linux friends so sharing..