How does tar update work?
Sorry for the noob question, but I'm confused as to how tar update command (tar -u) works exactly.
Let's say in my home folder, I create a tar of my Documents directory named Documents.tar. Then let's say some time goes by and I create, delete, and update some new files within Documents.
If I perform 'tar -uvf Documents.tar Documents', then it will add, remove, and update files within Documents.tar accordingly?
Also on a side note, when I was looking at the update description on computerhope.com, it mentioned compatibility for "extended headers"- what are they?
Thanks for any insight!
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