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find: Archiving

 
 9.2 Archiving
 =============
 
 You can pass a list of files produced by 'find' to a file archiving
 program.  GNU 'tar' and 'cpio' can both read lists of file names from
 the standard input - either delimited by nulls (the safe way) or by
 blanks (the lazy, risky default way).  To use null-delimited names, give
 them the '--null' option.  You can store a file archive in a file, write
 it on a tape, or send it over a network to extract on another machine.
 
    One common use of 'find' to archive files is to send a list of the
 files in a directory tree to 'cpio'.  Use '-depth' so if a directory
 does not have write permission for its owner, its contents can still be
 restored from the archive since the directory's permissions are restored
 after its contents.  Here is an example of doing this using 'cpio'; you
 could use a more complex 'find' expression to archive only certain
 files.
 
      find . -depth -print0 |
        cpio --create --null --format=crc --file=/dev/nrst0
 
    You could restore that archive using this command:
 
      cpio --extract --null --make-dir --unconditional \
        --preserve --file=/dev/nrst0
 
    Here are the commands to do the same things using 'tar':
 
      find . -depth -print0 |
        tar --create --null --files-from=- --file=/dev/nrst0
 
      tar --extract --null --preserve-perm --same-owner \
        --file=/dev/nrst0
 
    Here is an example of copying a directory from one machine to
 another:
 
      find . -depth -print0 | cpio -0o -Hnewc |
        rsh OTHER-MACHINE "cd `pwd` && cpio -i0dum"
 

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