List Open Ports and the Associated Process on CentOS / Redhat

Use the following commands to list the open ports.

sudo netstat -ltn
openport_1

Use the following commands to list the open ports and the associated process / program name

sudo netstat -lptun
openport_2

Quick way to find if a port is open (for example: port 705)
netstat -lnt | awk '$6 == "LISTEN" && $4 ~ ".705"'

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5 thoughts on “List Open Ports and the Associated Process on CentOS / Redhat

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