Two Frequently Used Options
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To understand how to run `tar' in the three operating modes listed
previously, you also need to understand how to use two of the options to
`tar': `--file' (which takes an archive file as an argument) and
`--verbose'. (You are usually not _required_ to specify either of
these options when you run `tar', but they can be very useful in making
things more clear and helping you avoid errors.)