Knowing how to compare files is important. Why? Well, imagine you’ve just upgraded an application, but the upgrade has failed for some reason. You now need to compare the configuration file with the backup file (assuming that a backup was performed before the upgrade) to see what’s changed. When comparing two files, you don't necessarily have to compare everything in them. You might need to compare only a certain column from the two files. In addition, how you display the ...

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