How to install Firebird 3.0 and 4.0 on Linux

In the article “How to install Firebird 3.0 and 4.0 on Linux” you can find the installation instruction for Firebird versions 3 and 4 on the popular Linux versions: CentOS 7, Oracle Linux 7/8, Debian 9/10, Ubuntu18/20, and OpenSUSE15.0.

How to install Firebird 3.0 and 4.0 on Linux