Top Linux command for Networking purpose

# Display all network interfaces and IP address
ip a
# Display eth0 address and details
ip addr show dev eth0
# Query or control network driver and hardware settings
ethtool eth0
# Send ICMP echo request to host
ping host
# Display whois information for domain
whois domain
# Display DNS information for domain
dig domain
# Reverse lookup of IP_ADDRESS
dig -x IP_ADDRESS
# Display DNS IP address for domain
host domain
# Display the network address of the host name.
hostname -i
# Display all local IP addresses of the host.
hostname -I
# Download http://domain.com/file
wget http://domain.com/file
# Display listening tcp and udp ports and corresponding programs
netstat -nutlp