View listening IPV4 ports only
netstat -lnt | awk 'NR>2{print $4}' | grep -E '0.0.0.0:' | sed 's/.*://' | sort -n | uniq
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View only listening ipv6 ports
netstat -lnt | awk 'NR>2{print $4}' | grep -E ':::' | sed 's/.*://' | sort -n | uniq
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Both ipv4 and ipv6
netstat -lnt | awk 'NR>2{print $4}' | grep -E '(0.0.0.0:|:::)' | sed 's/.*://' | sort -n | uniq
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If you want to list all ports listening on the localhost interface, use the following:
netstat -lnt | awk 'NR>2{print $4}' | grep -E '(127.0.0.1:|::1:)' | sed 's/.*://' | sort -n | uniq
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