To install libstdc++6 just follow these instructions.
/debian/stretch/main///install/index.html GNU Standard C++ Library v3 Debian 9.0 libs 6.3.0-18
sudo apt-get install libstdc++6
Which will install libstdc++6 and any other packages on which it depends.
Package | libstdc++6 |
Version | 6.3.0-18 |
Maintainer | Debian GCC Maintainers |
Description | GNU Standard C++ Library v3 |
Distro | debian |
Release | stretch |
Repo | main |
Section | libs |