(tar)Using Compare from the Superior Directory bis

Compare bis

How to Create Archives

Using Compare from the Superior Directory
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   In addition to using `--compare' (`-d') to compare individual files
in an archive with their counterparts in the file system, you can use
`--compare' (`-d') to compare archived directories with their
counterparts in the active file system.  You could re-create the
examples above using your home directory as the working directory, and
using the archive file `music' (in which is stored the `practice'
directory) instead of the archive file `records'.

   First, change into the home directory (`cd ..').  Then, try the
above example using `music' as the specified archive file, and the
`practice' subdirectory as a file name argument.

     % tar --compare --verbose --file=music practice
     practice
     practice/blues
     practice/blues: mod time differs
     practice/blues: size differs
     practice/folk
     practice/jazz
     practice/jazz: does not exist
     practice/records

   In addition to using `--compare' (`-d') to compare text files, you
can use `--compare' (`-d') to compare directories.  To illustrate this,
re-create the examples above using your home directory as the working
directory, and using the archive file `~/music' instead of the archive
file `~/practice/records'.

   First, change into your home directory (`cd ~').  Then, try the
above example using `music' as the specified archive file, and
`practice' as a file name argument.

     % tar --compare --verbose --file=music practice

   If you have been following along with the tutorial, `tar' will
respond:

     practice
     practice/blues
     practice/blues: mod time differs
     practice/blues: size differs
     practice/folk
     practice/jazz
     practice/jazz: does not exist
     practice/records