Guides
Step-by-step scenarios and problem fixes — every step is a verified command you can copy.
Find out whether macOS detects your external monitor, re-apply a working display mode with displayplacer, and verify the connection is healthy.
A terminal-first walkthrough to find what is holding your external disk open on macOS and eject it safely, from quitting apps to forcing an unmount.
Diagnose and fix recurring Time Machine backup failures on macOS from the Terminal: check status, verify the destination, and confirm a completed backup.
A verified, step-by-step path to opening a secure shell on a remote server using the tools already on your Mac.
Track down everything macOS launches for you at login — Login Items, launchd user agents and system daemons — from the Terminal, then switch off the ones you never asked for.
Find out how much RAM you really have, identify the process eating your memory with vmmap, and flush the cache to ease swap pressure.
Control what runs when Windows starts: open the Startup folder, change service startup types, and handle Fast Startup quirks.
A problem-fix walkthrough for a full Linux disk: find the culprit filesystem, remove space hogs, sweep caches, and verify the space came back.
A diagnose-fix-verify walkthrough for a full macOS disk: measure real free space, map APFS volumes, clear local Time Machine snapshots, and confirm the space came back.
Diagnose and fix repeated Wi-Fi dropouts on macOS using built-in terminal tools: check your connection, read signal stats, reset the interface, and verify the link holds.
Confirm out-of-memory kills in the kernel log, find the memory hog, install earlyoom, and tune swappiness so your Linux box stays responsive.
A step-by-step systemd troubleshooting guide: check status, read the journal, fix the unit file, reload, and restart.