Find Used Ports
An example of the netstat command with flags:
## Show listening sockets ##
sockstat -l
## Show listening sockets for IPv4 only ##
sockstat -4 -l
## Show listening sockets for IPv6 only ##
sockstat -6 -l
Find Selected Ports
You can use the grep command to select a certain ports. In this example, find out if port 22 and 80 is open or not:
sockstat -4 -l | grep :22
sockstat -4 -l | grep :80
Reference
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