I need to quench my thirst for knowledge and learn something new just for the sake of it.
I’ve already learned:
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Equations and pivot tables in Excel
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Vector graphics in Inkscape
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Music mixing in rekordbox
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Personal VPN on a raspberry pi 4 with OpenVPN
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LAMP stack web hosting
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Streaming & video capture with OBS
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Manual & automatic backups with FreeFileSync
Things I’m open to:
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FOSS (even beta) or free-as-in-beer software
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A high or low learning curve
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Tools for niche fields that I’d otherwise have no reason to learn


Latex is worth knowing, its most commonly used for academic papers, but it opens up a whole world of scripting automated documents. But, to make it really interesting, throw in
tikzand/orpgfplotsfor some interesting power tools. Tikz does A LOT, and is really powerful. But can definitely be overwhelming.And all this time, I thought Latex was just for condoms!