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Today I installed Acrobat Reader from the website, but it fails to run. When I try to run it from the command line, I get:

jdibling@hurricane /opt/Adobe/Reader9/bin $ ./acroread 
/opt/Adobe/Reader9/Reader/intellinux/bin/acroread: error while loading shared libraries: libxml2.so.2: cannot open shared object file: No such file or directory

However, libxml2 is installed and in the expected location:

root@hurricane /usr # find . -name "libxml2.so.2"
./lib/x86_64-linux-gnu/libxml2.so.2

I noticed that LD_LIBRARY_PATH is not set:

jdibling@hurricane /opt/Adobe/Reader9/bin $ echo $LD_LIBRARY_PATH

jdibling@hurricane /opt/Adobe/Reader9/bin $ 

I'm guessing that this is either the problem, or an indicator of the problem.

I'm not super familiar with how this variable is set under Ubuntu, but I have an inkling that is is done via /etc/ld.so.conf.d/ in some way:

root@hurricane /etc/ld.so.conf.d # grep "lib/x86_64-linux-gnu" *
x86_64-linux-gnu.conf:/lib/x86_64-linux-gnu
x86_64-linux-gnu.conf:/usr/lib/x86_64-linux-gnu
root@hurricane /etc/ld.so.conf.d # 

The chance that at some point I broke my system is greater than zero, but I'm lost as to where to go from here to troubleshoot and fix this problem. What can I do?

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A blank LD_LIBRARY_PATH isn't the problem.
It's not set by default in Ubuntu.

Per the comment on the answer on this question, it seems most likely that you installed the 64bit version of the library but you're running a 32bit application and therefore need the 32bit lib too.

sudo apt-get install libxml2:i386
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  • Hmm. I did that and now it's complaining that libstdc++.so.6: wrong ELF class: ELFCLASS64 – John Dibling Feb 20 '14 at 15:20
  • I don't know what to say. I downloaded and installed the deb, installed, and it ran fine. – Oli Feb 20 '14 at 15:29
  • I'm continuing to research. If I figure it out I'll let you know. – John Dibling Feb 20 '14 at 15:31
  • Problem solved. It turned out not to be libxml at all (apparently), but ia32-libs. This question is a direct duplicate. I can't vote to close my own question. Can you close as dupe? – John Dibling Feb 20 '14 at 15:37

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