The command diff
from the package diffutils
compares files line by line. It comes in very handy when you would like to check if there were recent changes to a file since the last backup and what they are. An exit status of 0
means no differences were found, 1
means some differences were found, and 2
means trouble. And of course, if there are changes, diff
will show them to you.
An introduction to the diff command
By
Joerg Kastning
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