How To Check Port 80 Is Open?
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The easiest way to check if port 80 is open is to use a port scanner like nmap. This can be done by running the following command in a terminal:
nmap –p 80 localhost
This will scan the localhost IP address and report any open ports. You should see an output something like this if port 80 is open:
Starting Nmap 7.60 ( https://nmap.org ) at 2019–05–09 10:54 EDT
Nmap scan report for localhost (127.0.0.1) Host is up (0.0011s latency).
PORT STATE SERVICE 80/tcp open http