Pass if both are true:
ollama --versionprints a version — no "command not found"ollama listruns without connection errors (empty list is OK)
Common fixes
| Problem | Fix |
|---|---|
ollama: command not found | Reopen terminal after install; Windows: reboot once; confirm install from ollama.com/download |
connection refused | Start Ollama (tray/menu-bar app, or ollama serve / sudo systemctl start ollama on Linux) |
| Installer won't run | Official download only; check admin rights |
Still stuck after two fixes? Note your OS and exact error — worth fixing before Lesson 3.
Continue when both pass.