I want an executable script that changes screen configuration from 1 to 2 or from 2 to 1. I would need a boolean or a variable where the state is saved. It's that possible?
Otherwise, how can I check with xrandr if i'm using config 1 or 2?
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You can probably ask
However, failing that, to actually answer the question, the usual method for this is testing for the existence of a file: