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These questions are about Linux in general -- NOT specific to a particular distribution. If the question just happens to be in a Linux environment, please specify your Linux distribution in the body of your question, but do NOT use the /linux tag.

18
votes
If using Bash Shell, then you can use its feature to check if a port is open or closed: (timeout 1 bash -c '</dev/tcp/127.0.0.1/17500 && echo PORT OPEN || echo PORT CLOSED') 2>/dev/null PORT OPEN (t …
answered Nov 4 '18 by in2nix4life