'no such file to load -- readline' error with Rails script/console

Having just hit this issue on my server where I'd recompiled Ruby from source, apparently on doing so you need to compile the readline library yourself as well.

There's a good how-to at dirk.net (it's really simple), but if like me you're using CentOS rather than some version of Debian, then rather than the 'sudo apt-get install libncurses5-dev', etc., you need the yum equivalent:

sudo yum install readline-devel

You won't (or at least I didn't) need the ilbncurses5-devel package equivalent. Once you've installed the readline developer package, you can follow the dirk.net instructions again and all should be well with the world and your console will work.