Linux: Networking Cheat Sheet

# Display all network interfaces and ip address

ifconfig -a

# Display eth0 address and details

ifconfig eth0

# Query or control network driver and hardware settings

ethtool eth0

# Print kernel module info

ethtool -i eth0

# Print eth0 traffic statistics

ethtool -S eth0

# Print RX, TX and auto-negotiation settings

ethtool -a eth0 

# Blink LED

ethtool -p eth0 

# Display whois information for domain

whois domain

# Send ICMP echo request to host

ping host

# Network Connec­tions

watch ss -tp

# Display listening tcp and udp ports and corresponding programs

netstat -nutlp

# TCP connec­tions

netstat -ant

# UDP Connec­tions

netstat -anu

# Connec­tions with PIDs

netstat -tulpn

# Display DNS information for domain

dig domain

# Display DNS ip address for domain

host domain

# Display the network address of the host name

hostname -i

# Display all local ip addresses

hostname -I

# Download file http://domain.com/filename

wget http://domain.com/filename