I mentioned briefly about the power of the awk command for large data processing over numerous files, in my other post, but did not provide any examples, which viewers could use.
Here, in this post, I am attaching an easy guide, from which, all Examples can be copied and pasted on to a Terminal ( for urxvt terminal use shift+insert keys OR middle click mouse to Paste - or else install LXTerminal or XCFE Terminal for ease of use ) and test these examples for learning.
This guide is taken from an online tutorial site and all credits goes to its authors.
Hope you find this guide very useful for your work.