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

Fix 'Command Not Found' in Ubuntu WSL Terminal

When you open Windows Terminal and run a command in Ubuntu WSL but get 'command not found', it's ...

Systemd Service Setup Checklist for Beginners

You've written a script and want it to run as a background service. Systemd is the modern way to ...

How to Fix Command Prompt Rate Limit Errors with Firewall Settings

If you see a rate limit error when using Command Prompt (cmd.exe) for network commands like ping,...

Fix VirtualBox Kernel Driver Permission Denied on Linux

Fix Redis Not Starting with systemctl on CentOS

If you run systemctl start redis on CentOS and the service fails silently, you're no...

Fix Windows Terminal High CPU Usage: Practical Steps

You open Task Manager and see Windows Terminal using 20–40% CPU even when idle. This usually poin...