I'm still in the process of tagging pages that were migrated from the old site, so for now you're best off using the search engine rather than relying on the tags.
- How to scan the ports of a computer and network - Scanning a computer The netcat command (or simply nc) can be used to scan the ports of a computer. This example scans localhost for open ports in the range 1-1023: bpc steph # nc -zv localhost 1-1023 localhost [127.0.0.1] 631 (ipp) open localhost [1...