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

How to Clear SSH Known Hosts and Fix Host Key Verification Failed

Fix PowerShell Assembly Cache Not Updating

You’ve updated a .NET assembly in the Global Assembly Cache (GAC) or copied a new DLL into a modu...

How to Fix Certbot Nginx Plugin Not Found Error

When running Certbot to obtain an SSL certificate for an Nginx server, you might see an error lik...

Fix Chrome DNS Probe Finished Bad Config Error

If you see 'DNS_PROBE_FINISHED_BAD_CONFIG' in Chrome, it usually means your computer can't reach ...

Fix Microsoft Teams SSL Certificate Error: Invalid Certificate

When you see "SSL certificate error: invalid certificate" in Microsoft Teams, the app may fail to...

Replacing Windows Defender on Ubuntu: Practical Alternatives

If you're migrating from Windows and miss the built-in protection of Windows Defender, you'll fin...