For many years I was using tcsh, with lots of useful customizations, that were created during these years. Now I have bash on my laptop and slowly adding what I’ve got used to.
Yesterday I’ve created command line completion rules for mysql-test-run. It’s not a complete set of everything that’s possible, still it’s quite useful as it is. I need to type much less now when invoking mysql-test-run (and I invoke it quite a lot).