add the old snippet md files

old_snippets/who-is-using-that-port.en.md

@@ -0,0 +1,16 @@
+---
+title: "who is using that damn port? (mac)"
+date: 2020-01-11T04:22:55+01:00
+draft: false
+snippet_types: ["lsof"]
+---
+
+```shell
+$ sudo lsof -i:3000
+```
+Launching a process and it's complaining about port being in use? With 100 shells running and os apps this can be hard to track down. Run this to get an idea of what to kill.
+
+source:
+
+[superuser](https://superuser.com/questions/304726/macos-what-process-is-using-port-8888)
+