Ubuntu18.04安装QGC报错 `GLIBC_2.29‘ not found

按照官网教程，最后运行时出错。

/tmp/.mount_QGroun2NOhPP/QGroundControl: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /tmp/.mount_QGroun2NOhPP/QGroundControl)
/tmp/.mount_QGroun2NOhPP/QGroundControl: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.26' not found (required by /tmp/.mount_QGroun2NOhPP/QGroundControl)

原因：官网的教程是针对Ubuntu20.04的。

解决方法 ：安装老版本QGC，此处安装 v3.5.6 版本的QGC，链接为https://github.com/mavlink/qgroundcontrol/releases?page=3，然后运行可通过。