--verbose (-v) shows details about the results of running
tar. This can be especially useful when the results might not be
obvious. For example, if you want to see the progress of
it writes files into the archive, you can use the `--verbose'
option. In the beginning, you may find it useful to use
`--verbose' at all times; when you are more accustomed to
tar, you will likely want to use it at certain times but not at
others. We will use `--verbose' at times to help make something
clear, and we will give many examples both using and not using
`--verbose' to show the differences.
Sometimes, a single instance of `--verbose' on the command line will show a full, `ls' style listing of an archive or files, giving sizes, owners, and similar information. Other times, `--verbose' will only show files or members that the particular operation is operating on at the time. In the latter case, you can use `--verbose' twice in a command to get a listing such as that in the former case. For example, instead of saying
tar -cvf afiles.tar apple angst aspic
above, you might say
tar -cvvf afiles.tar apple angst aspic
This works equally well using short or long forms of options. Using long forms, you would simply write out the mnemonic form of the option twice, like this:
$ tar --create --verbose --verbose ...
Note that you must double the hyphens properly each time.
Later in the tutorial, we will give examples using `--verbose --verbose'.
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