Quarrying
Charly's Column – Smorgasbord

Sys admin columnist Charly Kühnast has an electronic note box in which he collects ideas and small snippets of code. He calls it his "quarry" and is taking this opportunity to offer up some collectors' items to regular readers.
My life as a geologist started at a time before Git. Originally, I collected code in my "quarry" if I suspected I would need it again one day. Meanwhile, I hoard artifacts from configuration files, keyboard shortcuts that I can't remember for various shells, and names of tools I want to try.
Usually, none of them appear on this page, because each note contains no more than a few lines of text. That's a pity, so today I'm serving up a wildly mixed selection of notes in the hope that everyone will find something new.
The first note is a configuration snippet for Postfix. Many readers will be familiar with email featuring subject lines straight out of hell:
[...]
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