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Use the strace command to trace system calls and signals on Linux, debug why a program fails, find missing files, and measure where a process spends its time.

How to install PM2, run and manage Node.js processes with clustering, zero-downtime reloads, log rotation, and systemd integration that survives reboots.

Bash parameter expansion handles default values, substrings, string length, pattern trimming, search and replace, and case conversion, all inside the shell.

Use smartctl in Linux to check SMART health, read disk attributes, run self-tests, troubleshoot USB enclosures, and monitor NVMe wear.

Load average explained for Linux: what the three numbers from uptime and top mean, how they relate to CPU cores, and how to tell a busy system from an overloaded one.

Quick reference for Markdown syntax covering headings, formatting, links, images, lists, tables, code blocks, blockquotes, and common extensions.

Install Claude Code on Ubuntu, Debian, and other Linux distributions using the recommended native installer, official package-manager repositories, or npm.

Practical ffmpeg examples for converting between formats, compressing video with CRF, extracting audio, trimming clips, resizing video, and batch processing files on Linux.

Resolve the npm E401 'Unable to authenticate' error by fixing stale tokens, registry mismatches, and broken .npmrc auth settings for public and private registries.

Install Super Productivity on Linux with Flatpak, Snap, AppImage, deb, rpm, Docker, or source, then create your first task and start tracking time.