There are many instances when it’s useful to have multiple files open in vim, but if you aren’t familiar with this tool you can find yourself needlessly jumping around between multiple windows. If you are doing any type of real systems work on a Linux operating system I suggest that you familiarize yourself with vim. If you are not already using vim start by opening a command prompt and type vimtutor, once you’ve become familiar with how to navigate, search, and edit a document with vim this post will make more sense to you.
Use vim to see what is different between two files
There are several ways to find differences between two files on a Linux server or desktop. I like to use vim when I’m scanning a configuration file for recent changes from an earlier iteration ( assuming of course that there is a backup of the last known, good, configuration).
Comparing two files is a common task and there are several ways to view the differences between multiple files, but occasionally you may want to do this visually side by side.