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Maybe u need update your libc
Here the best link i had (https://www.cyberithub.com/how-do-i-install-the-linux-library-libc-so-6-in-5-easy-steps/)
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# Run the following commands
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-4.9
sudo apt-get upgrade libstdc++6