I found an old note to myself to look at the HTTP response headers for reddit.com. So I did this:
$ curl -v -s http://www.reddit.com/ > /dev/null * About to connect() to www.reddit.com port 80 (#0) * Trying 69.22.154.10… * connected * Connected to www.reddit.com (69.22.154.10) port 80 (#0) > GET / HTTP/1.1 > User-Agent: curl/7.24.0 (x86_64-apple-darwin12.0) libcurl/7.24.0 OpenSSL/0.9.8r zlib/1.2.5 > Host: www.reddit.com > Accept: */* > Server: ‘; DROP TABLE servertypes; — little Bobby tables from xkcd.
I’m sure this has made the rounds in other places. Unfortunately my note didn’t indicate where I first saw this.