Sometimes, you might want to know which socket your programming is binding to. Well it’s simple with just one command
lsof -i TCP -i UDP
Combined with other tool like grep, you can view/search for a specific application with its associated opened sockets
lsof -i TCP -i UDP | grep memcached
You will see something like this
memcached 22631 genie 4u IPv6 0x11a16e20 0t0 TCP *:11211 (LISTEN) memcached 22631 genie 5u IPv4 0x0bc55304 0t0 TCP *:11211 (LISTEN) memcached 22631 genie 6u IPv6 0x0b36c7bc 0t0 UDP *:11211 memcached 22631 genie 7u IPv4 0x0b36cc08 0t0 UDP *:11211
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