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


ssh and scp (secure connection and file transfer)
grep (the standard command-line search tool)
sed (Stream EDitor, good for find-replaces once you learn how to use it)
awk (can operate on text files or command output that’s organized in columns)
sc (terminal-based spreadsheet)
trash (safer replacement for rm that moves things to your desktop’s trash directory instead of deleting immediately)