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Check multiple IPs via bash one-liner loop using ping or dig

Ping multiple Linux servers via Bash script.

Pinging a Linux server sounds a very common and simple task for any SysAdmin.

However, if there are quite a few IP Addresses to check, it's quite daunting as typing on the terminal window is quite tedious and prone to error or mistype.

Bash script is a way to go for this type of task.

Just prepare all the IP Addresses that needs to be checked in a single text file.

Do a loop to check all the IP Addresses on the text file and just watch the Bash do its job.

Here's a simple code to do it:

for ipx in $(cat ipx.txt); do ping -c 3 $ipx; done

ipx.txt <<< should contain all IP Addresses to be checked

Example of ipx.txt contents:
1.2.3.4
4.5.6.7
10.10.10.1
....
....
etc..

Above command can also be used to check DNS Reverse record using dig.

Example:

for ipx in $(cat ipx.txt); do dig -x $ipx; done

The above will perform a reverse DNS lookup.
There's a lot of uses cases that can be done, with the above command.


That's it. Enjoy Scripting...


Stay safe! and Keep things up! 

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