Developer

How to Check Open Ports on Mac: lsof, netstat, and nc

Check open ports on Mac using lsof -i :3000, netstat, and nc. Covers local port checking and testing remote hosts, with real command output examples.

2026-05-16

nslookup on Mac: DNS Lookup Commands and When to Use Each

How to use nslookup, dig, and host on Mac for DNS lookups. Includes real-world examples for checking propagation, MX records, and debugging wrong IP addresses.

2026-05-16