Your addresses, one line per interface
Cheat sheet · 13 commands
Networking
Networking problems come in layers: is the host reachable, does the name resolve, is the port open, what does the server answer. There is one command per layer, in that order, on this sheet.
The 3 you will use every day
Listening ports with the owning process
Response headers only
The full sheet
- Is it reachable, and how farguide ›
- Your addresses, one line per interfaceguide ›
- Routing table and default gatewayguide ›
- Which interface and source IP would be usedguide ›
- Listening ports with the owning processguide ›
- Current established connectionsguide ›
- Resolve a nameguide ›
- Ask a specific resolver (bypass your cache)guide ›
- Where the domain's mail goesguide ›
- Response headers onlyguide ›
- Just the status codeguide ›
- Send JSON to an APIguide ›
- Download, resuming if interruptedguide ›
Practise these for real in the interactive course,
or keep every sheet, chapter and fix in one book: The Linux Command Line Handbook.