Quick Ruby Upcase Filter
Posted in North Star Labs, Solution, System Administration on 10/04/2007 09:00 am by jmccuneThis is a real quick one. I noticed uuidgen under linux produces lower case strings, while it’s Mac OS X counterpart produces uppercase strings. I generate UUID’s for the certificate CN field in Puppet, so I wanted them to match.
This one-liner did the trick nicely.
uuidgen | ruby -pe '$_.upcase!'
03/29/2008 at 5:00 pm
The old-time UNIX geek in me doesn’t like calling ruby when a much more lightweight solution has been around for ages: tr.
$ uuidgen | tr a-z A-Z
will do what you’re looking for with a bit fewer resources used (not that you’ll actually notice on a modern box).
(It turns out you actually want ‘tr “[:lower:]” “[:upper:]“‘ to be a nice member of the global community and deal with locales properly, but that’s a lot of extra typing.)