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ISO file creation -- procedure


 
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ISO file creation -- procedure

Hi All,

Am creating ISO file for same directory two times and both has different md5sum, Why does it so ?!

Am pretty sure that, there is no change in that directory between the ISO creations, So what could be issue ? Or is there any misunderstanding in the process.

Code:
mkisofs -J -R -otest1.iso ./testdir
mkisofs -J -R -otest2.iso ./testdir

Expecting both the md5sum to be same !! but it is not ??

Code:
$ md5sum test?.iso
2a1001de29b75013d1bb5a8a787cf2ef  test1.iso
d01b9b1120ec6662d582dc3af6f94338  test2.iso

Side Note: I have related question posted already here, which dont had answer, so tried other ways and the above is one of the doubt in other way... https://www.unix.com/unix-advanced-ex...-iso-file.html

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mkcd(1M)						  System Administration Commands						  mkcd(1M)

NAME
mkcd - create bootable Solaris ISO image SYNOPSIS
/usr/bin/mkcd -v [-l label] media-root iso DESCRIPTION
The mkcd utility takes media-root (the root of an on-disk Solaris install media) as input and creates a bootable Solaris ISO image in the file iso, using mkisofs(8). The file can then be burned onto a CD/DVD with utilities such as cdrw(1) or cdrecord(1). (Neither mkisofs(8) nor cdrecord(1) are SunOS man pages.) Caution - The directory tree media-root must contain the file boot/grub/stage2_eltorito, which will be written to the media boot sectors. This file will be modified with some boot information, thus it must be writable. If necessary, first save a copy prior to running this utility. OPTIONS
The following options are supported: -l label Sets label as the label/volume name of the ISO image. -v Verbose. Multiple -v options increase verbosity. OPERANDS
The following operands are supported: media-root Top-level directory of an on-disk Solaris install media. iso Name of the output file which will contain the resulting ISO image. EXAMPLES
Example 1 Creating an ISO Image and Burning a CD/DVD The following commands create an ISO image from the content of s10u1 and burn the image to a CD/DVD. # /usr/bin/mkcd s10u1 s10u1.iso # /usr/bin/cdrw -i s10u1.iso ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ SEE ALSO
cdrw(1), attributes(5) mkisofs(8), (/usr/share/man/man8/mkisofs.8), in the SUNWfsman package (not a SunOS man page) SunOS 5.11 25 Jul 2008 mkcd(1M)

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