cheat.sheets:netstat
# netstat
# Print network connections, routing tables, interface statistics, and more (deprecated).
# Display all active Internet connections
netstat -a
# Show only listening ports
netstat -l
# Display statistics for each protocol
netstat -s
# Show routing table
netstat -r
# Display addresses in numeric form
netstat -n
# Display only TCP connections
netstat -t
# Display only UDP connections
netstat -u
# Display PID and program name for each connection
netstat -p
# Refresh netstat output every few seconds (e.g., every 1 second)
netstat -c
# Display multicast group memberships
netstat -g
cheat:netstat
---
tags: [ networking ]
---
# WARNING ! netstat is deprecated. Look below.
# 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
# WARNING ! netstat is deprecated.
# Replace it by:
ss
# For netstat -r
ip route
# For netstat -i
ip -s link
# For netstat -g
ip maddr
tldr:netstat
# netstat
# Displays network-related information such as open connections, open socket ports, etc.
# More information: <https://man7.org/linux/man-pages/man8/netstat.8.html>.
# List all ports:
netstat --all
# List all listening ports:
netstat --listening
# List listening TCP ports:
netstat --tcp
# Display PID and program names:
netstat --program
# List information continuously:
netstat --continuous
# List routes and do not resolve IP addresses to hostnames:
netstat --route --numeric
# List listening TCP and UDP ports (+ user and process if you're root):
netstat --listening --program --numeric --tcp --udp --extend
$
cheat.sh