Luke Oliff · Blog
Writing.
Original posts, published first on this site. Imported posts live in the archive.
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213 posts
2025
TIL: Finding Disk Usage Per Directory With du -shOriginaldu -sh gives a human-readable total per directory. Find the largest space hogs on a drive without clicking through a GUI.TIL
TIL: Deduplicating Lines With sort -uOriginalsort -u sorts and removes duplicate lines in one pass. Clean up word lists, logs, and API response extracts without writing a script.TIL
TIL: Formatting Terminal Output Into Tables With columnOriginalcolumn -t aligns whitespace-separated data into clean columns. Pipe any command output through it for instantly readable tables.TIL
TIL: Mirroring Sites With wget Recursive ModeOriginalwget -r downloads an entire site recursively. Useful for offline reference copies of documentation when you are without internet.TIL
TIL: Structuring Monorepos With TypeScript Project ReferencesOriginalTypeScript project references let you split a codebase into composable packages. Each reference builds independently and incremental builds get faster.TIL
TIL: Speeding Up GitHub Operations With gh AliasesOriginalgh alias set maps custom shortcuts to any gh command. Common workflows become two-word commands instead of multi-flag incantations.TIL
TIL: Building JSON Payloads in Shell Scripts With jqOriginaljq constructs valid JSON from variables without string concatenation. No more broken payloads from missing quotes or unescaped characters.TIL
2024
TIL: Checking SSL Certificate Expiry With opensslOriginalopenssl connects to any TLS endpoint and prints the certificate details including expiry date. Automate cert monitoring in a cron job.TIL
An open letter on AIOriginalAI is a tool, a hammer. It's not good or bad; it's how we use it. On creativity, programming, and staying human through the next revolution.Open letter
TIL: Benchmarking Commands With hyperfineOriginalhyperfine runs a command multiple times and reports min, max, mean, and standard deviation. Compare tool performance with statistical confidence.TIL