Software comparisons, alternatives, and tool decision notes.

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

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

fatal: Unable to create &#...

How to Remove the Externally Managed Environment Flag in pip

If you're seeing error: externally-managed-environment when using pip on a moder...

Fix Git SSL Certificate Problem on Corporate Networks

If you see git SSL certificate problem: unable to get local issuer certificate while...

How to Fix Nginx Permission Denied Error

When Nginx returns a 403 Forbidden or logs a "permission denied" error, it usually means ...

Fix Windows Update Service Not Running with Permission Denied

You try to run Windows Update and get an error that the service is not running. When you try to s...

Fix net::ERR_CERT_AUTHORITY_INVALID on Chrome in Linux Terminal

When you see net::ERR_CERT_AUTHORITY_INVALID in Chrome on Linux, it usually means th...