How to check whether particular port is open or closed on UNIX?

Question

(Closed.) This question is off-topic. It is not currently accepting answers. question from:https://stackoverflow.com/questions/6139309/how-to-check-whether-particular-port-is-open-or-closed-on-unix

Answer 1

netstat -ano|grep 443|grep LISTEN

will tell you whether a process is listening on port 443 (you might have to replace LISTEN with a string in your language, though, depending on your system settings).