The output of
which -a ruby ends up being a path per line for every 'ruby' executable found within the user's PATH. This is an excellent type of output to pipe into another command—or series of them.
I've been struggling to empty the trash on an external drive that was formatted HFS Journaled for some time now (~4 months). So I finally remembered to google the actual error message (derp). I found this thread and started trying the suggestions. None worked until I got to this comment.
Option + Empty Trash did the trick.
I found this information somwhere on the interwebs. I wanted to get Jekyll to parse Markdown similar to the format used in Github Flavored Markdown. So I went a-googling. Here is the bits you need to add to your
_config.yml to get GFM.