Accidentally downgraded libstdc++6:amd64 from 12.1.0-2ubuntu1~22.04 to 10-20200411-0ubuntu1

Olumide

1/30/24, 9:58 PM

Why trying to get debug symbols for gcc/g++, I accidentally downgraded libstdc++6:i386 and libstdc++6:amd64 from 12.1.0-2ubuntu1~22.04 to 10-20200411-0ubuntu1 by running the following commands

wget http://archive.ubuntu.com/ubuntu/pool/main/g/gcc-10/libstdc++6_10-20200411-0ubuntu1_i386.deb
sudo dpkg -i libstdc++6_10-20200411-0ubuntu1_i386.deb
wget http://archive.ubuntu.com/ubuntu/pool/main/g/gcc-10/libstdc++6_10-20200411-0ubuntu1_amd64.deb
sudo dpkg -i libstdc++6_10-20200411-0ubuntu1_amd64.deb

Followed by errors like

dpkg: warning: downgrading libstdc++6:i386 from 12.1.0-2ubuntu1~22.04 to 10-20200411-0ubuntu1
(Reading database ... 662778 files and directories currently installed.)
Preparing to unpack libstdc++6_10-20200411-0ubuntu1_i386.deb ...
De-configuring libstdc++6:amd64 (12.1.0-2ubuntu1~22.04), to allow configuration of libstdc++6:i386 (12.1.0-2ubuntu1~22.04) ...
Unpacking libstdc++6:i386 (10-20200411-0ubuntu1) over (12.1.0-2ubuntu1~22.04) ...
dpkg: error processing package libstdc++6:i386 (--install):
 package libstdc++6:i386 10-20200411-0ubuntu1 cannot be configured because libstdc++6:amd64 is at a different version (12.1.0-2ubuntu1~22.04)
dpkg: error processing package libstdc++6:amd64 (--install):
 package libstdc++6:amd64 12.1.0-2ubuntu1~22.04 cannot be configured because libstdc++6:i386 is at a different version (10-20200411-0ubuntu1)
Processing triggers for libc-bin (2.35-0ubuntu3.1) ...
Errors were encountered while processing:
 libstdc++6:i386
 libstdc++6:amd64

Now lots of commands no longer work, especially apt for example

sudo apt-get update
apt-get: /lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.29' not found (required by /lib/x86_64-linux-gnu/libapt-private.so.0.0)
apt-get: /lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.29' not found (required by /lib/x86_64-linux-gnu/libapt-pkg.so.6.0)

Advise needed.

287

1 + 0

apt

glibc

22.04

Score:0

Ubuntu

Olumide

1/30/24, 10:30 PM

For posterity's sake here is what I did to solve the problem in my case

Get the packages for the libraries that I accidentally downgraded and then installed them.

wget http://security.ubuntu.com/ubuntu/pool/main/g/gcc-12/libstdc++6_12.1.0-2ubuntu1~22.04_amd64.deb
wget http://security.ubuntu.com/ubuntu/pool/main/g/gcc-12/libstdc++6_12.1.0-2ubuntu1~22.04_i386.deb
sudo dpkg -i libstdc++6_12.1.0-2ubuntu1~22.04_amd64.deb
sudo dpkg -i libstdc++6_12.1.0-2ubuntu1~22.04_i386.deb

The --force-all option mat be required in some cases.

+ 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Accidentally downgraded libstdc++6:amd64 from 12.1.0-2ubuntu1~22.04 to 10-20200411-0ubuntu1

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