lsof is the sysadmin/security über-tool. I use it most for getting network connection related information from a system, but that’s just the beginning for this powerful and too-little-known application. The tool is aptly called lsof because it “lists open files“. And remember, in UNIX just about everything (including a network socket) is a file. Interestingly, lsof is also the Linux/Unix command w
![An lsof Primer](https://cdn-ak-scissors.b.st-hatena.com/image/square/afbcd511ab67e904c7d10938a59f0e4cacf24117/height=288;version=1;width=512/https%3A%2F%2Fbeehiiv-images-production.s3.amazonaws.com%2Fuploads%2Fasset%2Ffile%2Fe5e9ad5a-b01a-4718-9c8b-bbf0b2f2e902%2Ful-newsletter-featured-2022.png%3Ft%3D1685089017)