tar: Overwrite Old Files

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1 Overwrite Old Files
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1 '--overwrite'
1      Overwrite existing files and directory metadata when extracting
1      files from an archive.
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1      This causes 'tar' to write extracted files into the file system
1      without regard to the files already on the system; i.e., files with
1      the same names as archive members are overwritten when the archive
1      is extracted.  It also causes 'tar' to extract the ownership,
1      permissions, and time stamps onto any preexisting files or
1      directories.  If the name of a corresponding file name is a
1      symbolic link, the file pointed to by the symbolic link will be
1      overwritten instead of the symbolic link itself (if this is
1      possible).  Moreover, special devices, empty directories and even
1      symbolic links are automatically removed if they are in the way of
1      extraction.
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1      Be careful when using the '--overwrite' option, particularly when
1      combined with the '--absolute-names' ('-P') option, as this
1      combination can change the contents, ownership or permissions of
1      any file on your system.  Also, many systems do not take kindly to
1      overwriting files that are currently being executed.
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1 '--overwrite-dir'
1      Overwrite the metadata of directories when extracting files from an
1      archive, but remove other files before extracting.
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