I am using terminal in Ubuntu Studio 20.4.2. During installs with apt in the terminal, if there is a dialog that requires a keyboard or mouse response, the response is not recognized and the apt install hangs at the dialog. This has happened with two installs thus far when using the terminal for apt installations.
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DEBIAN_FRONTEND=readlineto get a pure command line interface. See for example DEBIAN_FRONTEND environment variable – steeldriver Jun 06 '21 at 12:45