There are several commands which can help to diagnose the computer networking in Linux. ifconfig Command Interface configuration(ifconfig) is a command-line interface tool used for configuring, controlling and querying TCP/IP network interface parameters.It is used to initialize an interface, set the IP address and netmask of a network interface and enabling or disabling an interface on demand. This command is mainly used to know the IP address and MAC address assigned to an interface. -->ifconfig command with no arguments will display will display all network interfaces currently in operation. $ifconfig -a It will display all available details of the system irrespective of status.It doesn't bother whether the interface is inactive or active. $ifconfig eth0 It will show the configuration of a specific interface i.e. it will display the configuration of eth0 only. We can change the status of a specif...