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sudo apt-get update:

apt-get: /usr/lib/i386-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by apt-get)
apt-get: /usr/lib/i386-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by apt-get)
apt-get: /usr/lib/i386-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by /usr/lib/i386-linux-gnu/libapt-private.so.0.0)
apt-get: /usr/lib/i386-linux-gnu/libstdc++.so.6: version `CXXABI_1.3.8' not found (required by /usr/lib/i386-linux-gnu/libapt-private.so.0.0)
apt-get: /usr/lib/i386-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by /usr/lib/i386-linux-gnu/libapt-private.so.0.0)
apt-get: /usr/lib/i386-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by /usr/lib/i386-linux-gnu/libapt-pkg.so.5.0)
apt-get: /usr/lib/i386-linux-gnu/libstdc++.so.6: version `CXXABI_1.3.8' not found (required by /usr/lib/i386-linux-gnu/libapt-pkg.so.5.0)
apt-get: /usr/lib/i386-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by /usr/lib/i386-linux-gnu/libapt-pkg.so.5.0)

This is not a fresh install. I also tried to fix it by reinstalling the libc6-udeb package.

sudo dpkg -i libc6-udeb_2.24-12_i386.udeb:

dpkg: warning: files list file for package 'libstdc++6-4.7-dev:i386' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libc6-dbg:i386' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libstdc++-6-dev:i386' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libc6:i386' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libstdc++-4.8-dev:i386' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libc6-dev:i386' missing; assuming package has no files currently installed
(Reading database ... 245802 files and directories currently installed.)
Preparing to unpack libc6-udeb_2.24-12_i386.udeb ...
Unpacking libc6-udeb (2.24-12) ...
dpkg: error while cleaning up:
 subprocess rm command for cleanup was killed by signal (Segmentation fault)
Setting up libc6-udeb (2.24-12) ...

Running sudo dpkg --configure -a came back as:

Segmentation fault

Any suggestions?

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  • Is this on a fresh install? Have you done anything recently that could have caused this?
    – earthmeLon
    Jul 12, 2017 at 21:16
  • This resembles GLIBCXX_3.4.20 not found, how to fix this error? except that you are getting segfaults, even from programs that don't actually use C++ (the rm command, for example, is unlikely to call anything in Ubuntu C++ standard library implementation). Maybe more than libstdc++ is absent/broken. Were you running those commands inside a Python virtual environment (Anaconda or not)? Is this on a virtual server that was set up for you, an Ubuntu system you installed yourself, or something else?
    – Eliah Kagan
    Jul 12, 2017 at 21:56
  • it's not a virtual/cloud, it's a local machine that I installed some time ago. it was working until yesterday.
    – Ali
    Jul 12, 2017 at 22:15
  • I actually started out with Ubuntu 12.10 and arrived at a point where updating was not possible because Canonical moved the repositories to an 'archive' area after service expired(ended up upgrading to 14.04 LTS). If you are running a version that is older, it would be worth looking into whether the repos have been moved.
    – Craig
    Jul 13, 2017 at 1:54

1 Answer 1

Reset to default
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Sometimes things go so horribly wrong that the only way to fix them is by starting over. Thanks guys, but after trying everything else with no luck I knew i had to reinstall a new clean system and that's what i did. now everything works great.

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