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Linux Shell Scripting Cookbook by Sarath Lakshman

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Let's ping!

ping is the most basic network command, and one that every user should first know. It is a universal command that is available on major Operating Systems. It is also a diagnostic tool used for verifying the connectivity between two hosts on a network. It can be used to find out which machines are alive on a network. Let us see how to use ping.

How to do it...

In order to check the connectivity of two hosts on a network, the ping command uses Internet Control Message Protocol (ICMP) echo packets. When these echo packets are sent towards a host, the host responds back with a reply if it is reachable or alive.

Check whether a host is reachable as follows:

$ ping ADDRESS

The ADDRESS can be a hostname, domain name, or an IP address itself. ...

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