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Top Forums Shell Programming and Scripting UNIX file system to Linux file system migration Post 302805821 by jlliagre on Saturday 11th of May 2013 10:56:30 AM
Old 05-11-2013
It would help if you tell what file systems are used on the source and destination machines, what Unix OS is used, and what method you plan to use to perform the copy.

In any case, "du" is the wrong tool to check the proper copy.

If you really want to make sure all the files are copied without any corruption, create a hash/checksum of every file on the source side and use it to check it is correct on the destination one for each file.

You would also need to make sure all (empty) directories are created and possibly decide what to do with files taht are neither plain files nor directories.

Finally, you might also want to check the permissions, owner/group, extended attributes and ACLs if any.
 

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cp(1)							      General Commands Manual							     cp(1)

Name
       cp - copy file data

Syntax
       cp [ -f ] [ -i ] [ -p ] file1 file2

       cp [ -f ] [ -i ] [ -p ] [ -r ] file... directory

       cp [ -f ] [ -i ] [ -p ] [ -r ] directory... directory

Description
       The command copies file1 onto file2.  The mode and owner of file2 are preserved if it already existed; the mode of file1 is used otherwise.
       Note that the command will not copy a file onto itself.

       In the second form, one or more files are copied into the directory with their original file names.

       In the third form, one or more source directories are copied into the destination directory with their original file names.

Options
       -f   Forces existing destination pathnames to be removed before copying, without prompting for confirmation.  The -i option is  ignored	if
	    the -f option is specified.

       -i   Prompts  user  with  the name of file whenever the copy will cause an old file to be overwritten. A yes answer will cause to continue.
	    Any other answer will prevent it from overwriting the file.

       -p   Preserves (duplicates) in the copies the modification time, access time, file mode, user ID, and group ID as allowed  by  the  permis-
	    sions of the source files, ignoring the present umask.

       -r   Copies  directories.  Entire directory trees, including their subtrees and the individual files they contain, are copied to the speci-
	    fied destination directory. The directory, its subtrees, and the individual files retain their original names. For	example,  to  copy
	    the directory including all of its subtrees and files, into the directory enter the following command:
	    cp -r reports news

See Also
       cat(1), pr(1), mv(1)

																	     cp(1)
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