Original, tested, copy-pasteable command recipes for the tools developers fight daily. No signup, no paywall — tips accepted in crypto if a sheet saves you an hour.
Practical jq one-liners for extracting fields, filtering arrays, reshaping JSON and parsing logs — with explanations.
Working ffmpeg commands for shrinking video, trimming clips, making GIFs, extracting audio and fixing formats — explained line by line.
Undo commits, restore deleted branches, unstage files and recover lost work with reflog — the safe sequence for every Git disaster.
Reliable rsync incantations for full backups, incremental mirrors, resumable transfers and bandwidth-limited syncs over SSH.
Diagnose failed units, read journald logs, reload configs and build robust services — the systemctl and journalctl commands that matter.
Reclaim gigabytes of disk, inspect containers, follow logs and exec into shells — safe Docker housekeeping commands with warnings where they bite.
Test REST APIs from the terminal: headers, auth, JSON bodies, cookies, timing and redirects — curl flags explained through real requests.
Port forwarding, jump hosts, persistent tunnels and ~/.ssh/config patterns that eliminate repetitive SSH commands.
Locate files by name, size, age or content, batch-edit them safely, and avoid the classic xargs whitespace traps.
Create, split, verify and extract archives correctly — gzip/xz/zstd tradeoffs, excluding directories, and remote backups over SSH.
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