Knowledge base for software setup, errors, and daily tool work.

Fixing Nginx Permission Denied for Root Directory

You've set up a new Nginx server block, pointed the root directive to a directory, and when y...

Recover Lost Commits After Git Detached HEAD

You've made commits while in a detached HEAD state, and now you can't see them on any bra...

How to Fix Firefox Secure Connection Failed with VPN

You're using a VPN and Firefox suddenly shows 'Secure Connection Failed' on sites tha...

Fix Git Merge Conflicts with Deleted Files

You're in the middle of a merge and git stops with a conflict. One side deleted a file, the o...

Fix npm install Permission Denied on Shared Hosting

How to Fix Git Detached HEAD and Checkout a Branch

You're working in a Git repository, make some commits, and then realize you're in a '...