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: Commands, Examples, and Fixes

Run nslookup on Mac to check DNS records, query a specific server, and look up an IP address. Learn what the output means and how to troubleshoot errors.

2026-05-16