On Sat 21 Dec 2019 at 14:24:28 -0700, Charles Curley wrote: > On Sat, 21 Dec 2019 20:34:42 +0000 > Brian <a...@cityscape.co.uk> wrote: > > > I trust you have already pulled in and used the checksum file(s) for the > iso itself. If those fail to verify, there isn't much point in > proceeding.
Indeed. > > I am extracting files from a Debian ISO as follows: > > > > xorriso -osirrox on -md5 on -indev debian-10.2.0-i386-DVD-10.iso > > -extract pool/main test/ > > xorriso strikes me as a bit of overkill. I usually just mount the iso > image and treat it as a read-only file system. But as long as it > works for you... . > > The first thing I do after mounting it is verify the checksums in situ > in the image. Something like: > > mount foo.iso /mnt > cd /mnt > shaXXXsum --q -c filename.shaXXXsums > > > > > > Will the files in test/ have the same md5sum as the ones in the ISO? > > Obviously, I am looking to obtain uncorrupted files. > > > > What will the output show if there is a problem with extraction? > > > > Each the output line for each file that fails will have the word FAIL > in all caps. You can use the --quiet option (--q for short) to have the > program spit out only problematic results. Basically, I want to compare the MD5sum (or shaXXXsum) for each file in the ISO with the MD5sum for each extracted file. Either during extraction or afterwards. -- Brian.
