← Linux Administration learning pathLinux Administration · Module 7 of 10
Networking
Configure and troubleshoot Linux networking.
📖 Key ideas
- ip a shows interfaces and IP addresses.
- ping tests reachability; traceroute shows the path.
- ss -tulpn lists listening ports.
- curl tests HTTP endpoints.
- DNS: /etc/resolv.conf; local names: /etc/hosts.
💡 Real-life example: Network troubleshooting is checking a phone line step by step: dial tone, ringing, someone answering.
ip aShows network interfaces
pingTests reachability
ssShows sockets/ports
/etc/hostsLocal name-to-IP mapping