cheat/cheatsheets/netstat

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# To view which users/processes are listening to which ports:
sudo netstat -lnptu
# To view routing table (use -n flag to disable DNS lookups):
netstat -r
# Which process is listening to port <port>
netstat -pln | grep <port> | awk '{print $NF}'
Example output: 1507/python
# Fast display of ipv4 tcp listening programs
sudo netstat -vtlnp --listening -4