mtr

 The My TraceRoute (mtr) utility provides a real-time look at network performance on a Linux system. Use Ctrl+C to interrupt it when you're done monitoring. Look at the mtr man page for options on saving results to a file.

To see mtr results in real-time, enter:

mtr comptia.org

Figure 8: The Linux mtr command

• Host: The host that represents the step in the trace between you and the target hostname. The records are ordered so that the first is the nearest to you. You’ll see here the hostNames or the numeric IP addresses of the nodes.
• Packet – Loss %: This is the percentage of packet loss that occurred during the test. A 0 here means a 100% response percentage with no packet loss.
• Packet – Snt: The total count of outgoing packets that have been sent with that TTL.
• Last: This is the performance of the last ping to this node.
• Avg: This is the average latency of the node during the test.
• Best: In this field we can find the best latency for the hosts.
• Wrst: This column shows the worst round-trip time for each host.
• Stdev: This shows the standard deviation of the ping time.

Select Ctrl+C when you're done.