A quick guideline on how to fix the Hearthbleed bug (and update OpenSSL) on Ubuntu
If you still haven’t fixed your servers after mainstream discovery of the legendary Hearthbleed bug, then do it now –
Tagssl
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The SSL Heartbleed bug explained in 30 seconds
Another excellent comic by xkcd (a site that publishes dev/op/web-related comics, usually nailing things right to the head): This time