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When trying to start a certain program, I got the following error message:

error while loading shared libraries: foo.so.0: cannot open shared object file: No such file or directory

Therefore I built the required library and installed it under the directory /usr/local/lib/. However, after building the library, there were only the files foo.so, foo.so.1 and foo.so.1.0.8 under /usr/local/lib/. So I created an additional symbolic link to foo.so.1.0.8 named foo.so.0. I checked that /usr/local/lib is included in some file under /etc/ld.so.conf.d/ and started sudo ldconfig.

Unfortunately ldconfig seems to ignore my self-created symbolic link. ldconfig -v prints only the following line:

foo.so.1 -> foo.so.1.0.8

ldconfig -p prints only the following two lines:

foo.so.1 (libc6,x86-64) => /usr/local/lib/foo.so.1

foo.so (libc6,x86-64) => /usr/local/lib/foo.so

There is not a blind bit of the file foo.so.0. What do I have to do?

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What are you trying to install / run and how did you install it? Sounds as if you installed a package outside of apt (apt-get or the software center). –  bodhi.zazen Feb 18 at 23:30
I downloaded and built an Open MPI release as I have to run a program which requires it. –  user1494080 Feb 18 at 23:36
did you try installing openmpi from the repos ? sudo apt-get install openmpi-bin ? Otherwise , link to what you installed please. –  bodhi.zazen Feb 18 at 23:37
I downloaded the tarball from the official website and did the following: open-mpi.org/faq/?category=building#easy-build –  user1494080 Feb 18 at 23:41
I would try the package I gave you packages.ubuntu.com/precise/openmpi-bin , same program, packaged for Ubuntu. Is there some reason you are compiling from source code ? –  bodhi.zazen Feb 18 at 23:44
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