I am trying install a program named Teletalk 3G in my ubuntu 15.10. However there seems to be some dependencies missing, so i ran the "ldd" command to see which dependencies were missing. I got these files as "not found":-

libfreetype.so.6 => not found
libSM.so.6 => not found
libICE.so.6 => not found
libXrender.so.1 => not found
libfontconfig.so.1 => not found
libXext.so.6 => not found
libX11.so.6 => not found

However, i later found out that each of this files are present in "/usr/lib/x86_64-linux-gnu" So i tried to create symbolic links of these files in "/usr/lib". However this gives an error like "error while loading shared libraries: libfreetype.so.6: wrong ELF class: ELFCLASS64". I googled about this and learned that wrong architecture of libraries is probably the reason.

I would like to know which libraries i need to install to get rid of this problem.

Thank you.

  • What's the output of file <executable>, just to be sure?
    – kos
    Mar 8, 2016 at 17:47
  • output of "file Teletalk_3G" : Teletalk_3G: setuid ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 2.6.15, BuildID[sha1]=cd0be0d9a95ef23dbdce3247fac5807f6735d4d2, not stripped
    – KAI10
    Mar 8, 2016 at 17:49

1 Answer 1


First, remove the symlinks from /usr/lib, as those wil trick the linker;

Then, install the 32-bit version of the libraries:

sudo apt-get install libfreetype6:i386 libsm6:i386 libice6:i386 libxrender1:i386 libfontconfig1:i386 libxext6:i386 libx11-6:i386

The linker should be able to find them automatically without extra configuration afterwards.

  • say, if i face this kind of problem again, how can i find the name of the libraries that need to be installed ?? Thank You.
    – KAI10
    Mar 11, 2016 at 4:40
  • @KAI10 You're welcome. I found them using apt-file (apt-file search '<filename>') because I'm more used to it but since apt-file searches all sources listed in /etc/apt/sources.list sometimes it may be handier to search packages.ubuntu.com, which will report only results in the default repositories.
    – kos
    Mar 11, 2016 at 4:48
  • if you do this, you can't remove them with autoremove, can you?
    – Pui Ho Lam
    May 31 at 19:33

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