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I have /usr/lib32/libstdc++.so.6 library on my Ubuntu system. I would like to know which package brought it there. How to know that?

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  • libstdc++.so.6 is the C++ standard library - many applications (including those shipped by Ubuntu) depend on it.
    – Jonas Czech
    Mar 15, 2018 at 14:36

4 Answers 4

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Please run dpkg -S /usr/lib32/libstdc++.so.6

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  • as output I got lib32stdc++6: /usr/lib32/libstdc++.so.6 . Does lib32stdc++6 is package name?
    – vico
    Mar 15, 2018 at 13:28
  • Does it possible that lib32stdc++6 came with another package in my system? If yes, how to know whole hierarchy then?
    – vico
    Mar 15, 2018 at 13:34
  • Sure, it is the package name. If you not sure, you can check if you have it installed by dpkg -l | grep lib32stdc++6
    – mariaczi
    Mar 15, 2018 at 13:38
  • I don't remember I run command aptitude install lib32stdc++6 is it possible that this package came with another package?
    – vico
    Mar 15, 2018 at 13:42
  • It maybe was installed as a dependency of another one.
    – mariaczi
    Mar 15, 2018 at 13:45
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Now that you know which package /usr/lib32/libstdc++.so.6 came from, you can find out which packages depend on lib32stdc++6 by running:

sudo apt-cache rdepends lib32stdc++6

This will give you a list of package(s) that depend/installed lib32stdc++6

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Another solution is to use the tool apt-file :

  • Install it using :

    $ sudo apt-get update && sudo apt-get install apt-file

  • Update it's database :

    $ sudo apt-file update

  • Search for your desired file : 

    $ sudo apt-file search /usr/lib32/libstdc++.so.6

The result should be : 

$ apt-file search /usr/lib32/libstdc++.so.6
lib32stdc++6: /usr/lib32/libstdc++.so.6
lib32stdc++6: /usr/lib32/libstdc++.so.6.0.21
lib32stdc++6: /usr/share/gdb/auto-load/usr/lib32/libstdc++.so.6.0.21-gdb.py
lib32stdc++6-5-dbg: /usr/lib/debug/usr/lib32/libstdc++.so.6.0.21

/usr/lib32/libstdc++.so.6

Which lead us to know that the package which installed should be lib32stdc++6.

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You can search it in https://packages.ubuntu.com

For your case will be this link.

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  • But how to find libstdc++.so.6 there?
    – vico
    Mar 15, 2018 at 13:35
  • Check for the 2nd link, that link contains the search I made for you.
    – Maki
    Mar 15, 2018 at 13:37
  • I see Package lib32stdc++6 that I suppose contains many files and one of them might be libstdc++.so.6. But I don't see that exactly.
    – vico
    Mar 15, 2018 at 13:45
  • If you go inside the link I shared with you, you will see this, that's the prove of the file you are searching for.
    – Maki
    Mar 15, 2018 at 14:11

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