Display shared libraries used by executables in linux

Question

So I want to know how to list all the libraries associated with executables on my system. Then I'd like to rank them according to the libraries which are used most with their corresponding binaries. How do I do this?

Answer 1

In order to do this, you need to:

1. Use ldd to list shared libraries for each executable
2. Clean the output
3. Sort, compute counts and sort by count

Now, to do this for all binaries in the /bin directory:

find /bin -type f -perm /a+x -exec ldd {} \; \
| grep so \
| sed -e '/^[^\t]/ d' \
| sed -e 's/\t//' \
| sed -e 's/.*=..//' \
| sed -e 's/ (0.*)//' \
| sort \
| uniq -c \
| sort -n

If you want to search all the directories just use '/' instead of '/bin':

This is the output sample for the bin directory:

  1 /lib64/libexpat.so.0
  1 /lib64/libgcc_s.so.1
  1 /lib64/libnsl.so.1
  1 /lib64/libpcre.so.0
  1 /lib64/libproc-3.2.7.so
  1 /usr/lib64/libbeecrypt.so.6
  1 /usr/lib64/libbz2.so.1
  1 /usr/lib64/libelf.so.1
  1 /usr/lib64/libpopt.so.0
  1 /usr/lib64/librpm-4.4.so
  1 /usr/lib64/librpmdb-4.4.so
  1 /usr/lib64/librpmio-4.4.so
  1 /usr/lib64/libsqlite3.so.0
  1 /usr/lib64/libstdc++.so.6
  1 /usr/lib64/libz.so.1
  2 /lib64/libasound.so.2
  2 /lib64/libblkid.so.1
  2 /lib64/libdevmapper.so.1.02
  2 /lib64/libpam_misc.so.0
..... and so on