CliAI blog

git filter-repo --invert-paths --path <file> rewrites the commits, but rotate the leaked key first — filter-branch is deprecated and a rewrite alone won't undo the exposure.

nohup covers the process you planned for ahead of time; disown rescues one you already started; tmux, setsid, and systemd-run handle the rest, depending on what you actually need.

kill -9 fails against zombies, D-state processes, and anything a supervisor restarts. How to tell the three apart and what actually kills each one.

jq '.field' pulls a value out of JSON; -r strips the quotes, select() filters, and @csv turns an API response into rows a spreadsheet can read.

du -h --max-depth=1 | sort -rh, then walk down one level at a time. Plus the -x flag that stops du counting other filesystems into your answer.

Both are. The space belongs to files that were deleted while a process still had them open — or you ran out of inodes, not bytes. How to find which, in four commands.

Describe the task in English, get the exact shell command back, read it, then run it. What these tools do, where they break, and how they differ from an AI coding agent.

The error "invalid command code" means macOS ships BSD tools, not GNU ones. Six flag differences that break Linux scripts on a Mac, with the fix for each.

docker system df first, prune second. What each prune actually deletes, why volumes survive by default, and how to avoid removing the image you still need.

git reset --soft HEAD~1 if you haven't pushed, git revert if you have. The difference between soft, mixed and hard, and how reflog gets you back when you pick wrong.

A leak isn't high memory, it's memory that never comes back down. Sample RSS over time with pidstat, confirm with pmap, and tell a leak from a cache.

awk -F, '{print $2}' works until one field contains a comma inside quotes — then every column after it shifts and your totals go quietly wrong.