NETWORKING COMMANDS

PING 

WINDOWS:

If we are having connectivity problems, we can use the ping command to check the destination IP address we want to reach and record the results. The ping command displays whether the destination responded and how long it took to receive a reply. If there is an error in the delivery to the destination, the ping command displays an error message. 

You can directly ping specific system by using ip address(ping ip address)

OR you can ping any specific website by using its address.But some times you will get an error like "Ping request could not find host www.google.com. Please check the name and try again." this is because of DNS issues.

To solve this problem see

http://www.corenetworkz.com/2012/09/ping-request-could-not-find-host-please.html

after solving the problem type

ping www.google.com

UBUNTU:

NETSTAT:

netstat (network statistics) is a command-line tool that displays network connections (both incoming and outgoing), routing tables, and a number of network interface statistics. It is used for finding problems in the network and to determine the amount of traffic on the network as a performance measurement

UBUNTU:

NSLOOKUP:

nslookup is to query Domain Name System (DNS) servers and to find DNS details, including IP addresses of a particular computer.