Find the OS information
uname -a
IP link : Shows the network link on your system and status of those links
ip link
UP means you are physically connected and LOWER_UP mean you are connected to it via network
ip address : this command shows your network ip address (not the public ip address), we can also reconfigure the ip address using this command
ip address
ping : This command is used to check the network reachability to an ip address
ping -c5 8.8.8.8
This send in total 5 pings to an ip address
traceroute : To trace the network route
traceroute <ip>
Shows all the hops that will be taken while routing through an ip address
dig : Shows the dns resoution of the web address
dig www.googel.com
netstat : net statistics
netstat : active network sockets on your host
netstat -l : active processes listening for inbound traffic