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The Unix Magic Poster
I understand the classic UNIX Magic poster by Gary Overacre was distributed at past USENIX conferences, and I’ve known of it for years but now in confinement, I’ve decided I want one to hang in my ...
Jan-Piet Mens
The root DNSSEC trust anchor, the Key Signing Key or KSK as it’s called, was rolled, i.e. renewed, on Sunday 2026-10-11. To be precise the key was created two years ago, but it is now used for signing the root DNSKEY resource record set (RRset). I’m not involved in the process, but I am an avid follower, and as such I…
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2
Jo – a shell command to create JSON (2016)
I got tired of attempting to get shell scripts to produce valid JSON. You’ve likely seen something like this before: echo '{
3
SSH certificates: the better SSH experience
When I ssh into a server for the first time, I’m confronted with a dialog which asks me to verify I’m actually talking to the machine I expect to be talking to. $ ssh -l jp 192.0.2.65 The authenti...
4
An iOS app update that annoys me
Almost a year ago I started using a delightful little iOS app called Receipt Box. It did exactly what I wanted: I could tap in an expense and a category, and the app added a geo location to the exp...
5
Rediscovering CardDAV
I can no longer sync iOS’ Contacts with my macOS Catalina’s Finder (the iOS sync portion of iTunes is now built into the Finder in macOS Catalina); the OS insists I’ve iCloud configured for Contact...
6
It used to be simpler to teach Unix
When I began teaching Unix around anno 1986, the Unix ls(1) utility printed a list of files to stdout, one per line. It was trivial to explain the concept of not requiring a program which tells you...
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TOTP Codes in the Terminal
The demise of Authy desktop has brought about a number of changes, probably the one of which I most appreciate is a mobile app which lets me edit codes: with 2FAS I can edit labels on codes, and I’...