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I have two machines. One of which started to act strange lately (aptitude segfaulting, apt requiring a library named lkbm.qo.6). As the broken machine is not vital to me, I don't want to squash and reinstall it from scratch, but to investigate the problem however long it takes.

So, I have second machine thats acting fine so I would like to scan all installed packages on the broken machine and have the libs hash checked against the good ones.

Of course I can write a script for that, but I wanted to be sure that nobody else has solved that already.

The point is that I don't trust the broken machine. While it being intruded by an outsider is unlikely in this situation I would love to have a solution that would work even then.

(I'd love to add a validation tag, but could not find one.)

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Have a look here: askubuntu.com/questions/9463/… – goldilocks Jan 8 '14 at 12:22
@goldilocks but debsums itself may be somehow compromised on the misbehaving machine. – Joseph R. Jan 8 '14 at 12:26
@JosephR. but it's easy to check debsums offline (on a known-to-be-good machine) – umläute Jan 8 '14 at 20:16
@umläute Interesting. Can you please elaborate? – Joseph R. Jan 8 '14 at 20:24
@umläute would you care to add the approach to use debsums offline as an answer? Sounds like exactly what I want to do. – Angelo Fuchs Jan 9 '14 at 9:07

If you want, for example, check md5sum for all file in /bin, you can:

  • mount you /bin dir from broken machine into the good machine and then run a check with executables on the good machine.


for i in `ls /mounted/bin` 
        md5sum /bin/$i >> broken.txt

for i in `ls /bin` 
        md5sum /bin/$i >> good.txt

cmp broken.txt good.txt

But i'm not sure that this is what you are asking for....

share|improve this answer
Good approach. Unfortunately the two don't run the same system (debian squeeze vs. debian wheezy) So using my own md5sums won't work. – Angelo Fuchs Jan 8 '14 at 18:42
Could you create a virtual machine? – maurelio79 Jan 9 '14 at 17:19
Yes, but I'd rather use md5sums from the package system. – Angelo Fuchs Jan 10 '14 at 8:24

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