Linux Networking Commands Cheat Sheet — 40 Commands You Actually Use
telegra.ph
Diagnostics These are the commands you reach for when something is broken. # Check if a host is reachable ping -c 4 example.com # Trace route traceroute example.com mtr example.com # interactive version # DNS lookup dig example.com dig +short example.com A dig @8.8.8.8 example.com # specific DNS server # Reverse DNS dig -x 93.184.216.34 # What's listening on ports ss -tlnp netstat -tlnp # older systems # Which process owns a port lsof -i :8080 fuser 8080/tcp Interface Management # Show all…

Made a cheat sheet of networking commands organized by task instead of alphabetically:

  • Diagnostics: ping, dig, ss, mtr, lsof
  • Interfaces: ip addr/route/link/neigh
  • Traffic: tcpdump, nethogs, iftop, nload
  • Curl: timing flags, --resolve, retry with backoff
  • SSH tunnels: local/remote/SOCKS/background
  • Firewall: iptables + nftables equivalents

Nothing obscure, just the stuff you actually reach for.