Linux Check Active Ports


Check active ports on Linux

$ sudo netstat -tulpn


Get ordered list

$ sudo touch /usr/bin/check-active-port

$ sudo nano /usr/bin/check-active-port


Paste these into "check-active-port" :

---   ---   ---

netstat -tulpn | (read -r h1; read -r h2; echo "$h1"; echo "$h2"; sort -k1,1 -k4,4)

---   ---   ---


Then update file permission

$ sudo chmod a+x /usr/bin/check-active-port


Note : if command "netstat" does not available, install by following command bellow.

$ sudo apt install net-tools


Source :

https://www.cyberciti.biz/faq/unix-linux-check-if-port-is-in-use-command/

https://www.tecmint.com/install-netstat-in-linux/

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