libstdc++.so.6 version `GLIBCXX3.4.22' not found

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strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep GLIBCXX
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install libstdc++6
strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep GLIBCXX