Workflow manuals for setup steps, repeatable tasks, and software operations.

Fix 'git pull failed index.lock file exists' Error

When running git pull, you may see an error like:

fatal: Unable to create &#...

Fix Nginx Redirect Loop After SSL Certificate Install

You installed an SSL certificate, and now your site redirects in a loop. The browser shows 'E...

Fix Chrome Black Screen on Intel Graphics with Hardware Acceleration

If Chrome shows a black screen on an Intel graphics system, especially after an update, hardware ...

Windows 11 Blue Screen After Driver Update: Rollback Fix

You update a driver in Windows 11, and then you get a blue screen on reboot. This is a common pro...

Fix Nginx Upstream Connection Refused Error

When Nginx returns upstream connection refused in your error logs, it means Nginx tr...

Fix DNS Probe Finished NXDOMAIN on Custom DNS Server

If you see “DNS PROBE FINISHED NXDOMAIN” in Chrome or another browser while using a custom DNS se...