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brightnessctl 0.1.1 - read and control device brightness.

Usage: brightnessctl [options] [operation] [value]

Options:
  -l, --list			list devices with available brightness controls.
  -q, --quiet			suppress output.
  -p, --pretend			do not perform write operations.
  -m, --machine-readable	produce machine-readable output.
  -s, --save			save previous state in a temporary file.
  -r, --restore			restore previous saved state.
  -h, --help			print this help.
  -d, --device=DEVICE		specify device name.
  -c, --class=CLASS		specify device class.

Operations:
  g, get			get current brightness of the device.
  m, max			get maximum brightness of the device.
  s, set VALUE			set brightness of the device.