[ubuntu-studio-users] Set and clear bits in a bash script

[Ralf Mardorf]

Hi,

I'm writing a Matrix-1000 CLI editor bash script. After a rest for
perhaps more than a week, I want to continue within the next days.

Is there a way to set and clear bits of a byte in a bash script, by
using "or" and "and" or has this to be done by an annoying workaround?

I don't find an answer, when I search the Internet.

Regards,
Ralf