Kibana is great for searching and graphing logs from logstash. The learning curve is a little steep though.
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I'm experimenting with Atuin for searching my terminal history: https://atuin.sh/
Previously I'd just used fzf to find items, which does work nicely. Occasionally I *really* want to search "commands which were run in this directory" though, which Atuin offers.
Learning software development through playing and contributing to a MUD: https://tashian.com/articles/how-i-learned-to-program/
I've been learning some Common Lisp by writing some simple JSON munging programs. I'm sure it's not best practice — I should probably deserialise to CLOS automatically — but it's a nice way to get comfortable with the basics.
It feels weird deliberately ignoring helpers though.