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Top Forums Shell Programming and Scripting Compare directories and copy differences (files) in a another directory Post 303038817 by RudiC on Saturday 14th of September 2019 12:07:41 PM
Old 09-14-2019
What will a "difference" be to you? Just files missing, i.e. different directory contents? Or files with different meta data, i.e. size and/or timestamp? Or do you need to byte compare every single file to its counterpart?
 

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CMP(1)							    BSD General Commands Manual 						    CMP(1)

NAME
cmp -- compare two files SYNOPSIS
cmp [-l | -s] file1 file2 [skip1 [skip2]] DESCRIPTION
The cmp utility compares two files of any type and writes the results to the standard output. By default, cmp is silent if the files are the same; if they differ, the byte and line number at which the first difference occurred is reported. Bytes and lines are numbered beginning with one. The following options are available: -l Print the byte number (decimal) and the differing byte values (octal) for each difference. -s Print nothing for differing files; return exit status only. The optional arguments skip1 and skip2 are the byte offsets from the beginning of file1 and file2, respectively, where the comparison will begin. The offset is decimal by default, but may be expressed as an hexadecimal or octal value by preceding it with a leading ``0x'' or ``0''. The cmp utility exits with one of the following values: 0 The files are identical. 1 The files are different; this includes the case where one file is identical to the first part of the other. In the latter case, if the -s option has not been specified, cmp writes to standard output that EOF was reached in the shorter file (before any differences were found). >1 An error occurred. SEE ALSO
diff(1), diff3(1) STANDARDS
The cmp utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BSD
June 6, 1993 BSD
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