Error loading shared libraries: libstdc++.so.6

Question

When I use

$apt-get update

Output- error while loading shared libraries:libstdc++.so.6

$apt-file search libstdc++.so.6
File usr/lib/command not found 

How can I add this library?

---

$ lsb_release -a 
No LSB modules are available. 
Distributor ID: Ubuntu
Description: Ubuntu 18.04.4 LTS 
Release: 18.04 
Codename: bionic

$ apt-cache policy libapt-pkg?.0
apt-cache: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.26' not found (required by /usr/lib/x86_64-linux-gnu/libapt-pkg.so.6.0) 

Solution

You need to install corresponding packages manually by

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

and then you will be able to run

sudo apt update

and

sudo apt install --reinstall libstdc++6 libstdc++6:i386 libapt-pkg6.0
sudo apt install command-not-found apt-file

Comments

[N0rbert]

The main thing which I can't understand - why APT tries to locate libapt-pkg.so.6.0 from newer version of Ubuntu (20.04 LTS) rather than standart libapt-pkg.so.5.0. Did you tried to upgrade this system? Did this upgrade failed?

[Jigyansha]

yes the system was upgraded and it was failed

[N0rbert]

It is a bit bad, that you did not mention it at start. See updated answer.

[Jigyansha]

Sudo apt is not working

[Jigyansha]

Sudo dpkg above gives error " package libstdc++6:amd64 8.4.0~18.04 cannot be configured because libstdc++6:i386 is at different version

[N0rbert]

See updated answer. Install 32-bit first, then 64-bit.

[Jigyansha]

now after sudo apt update "apt: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.26' not found (required by /usr/lib/x86_64-linux-gnu/libapt-pkg.so.6.0)" this error is showing