How to use the command 'ybacklight' (with examples)

The ‘ybacklight’ command is used to manage screen backlight brightness. It is a command line utility that allows you to control the brightness of your screen. The command can be used to print the current brightness, set a specific brightness value, increase or decrease the brightness by a certain amount.

Use case 1: Print current brightness and maximal brightness, shortened and separated by a slash

Code:

ybacklight Sc/Sm

Motivation: This use case is useful when you want to quickly check the current brightness level of your screen and know the maximum brightness that is supported.

Explanation: In this command, ‘ybacklight’ is the command name. ‘Sc’ is the argument used to print the current brightness level, and ‘Sm’ is used to print the maximum brightness level. The two values are separated by a slash.

Example output:

50/100

In the example output above, the current brightness level is ‘50’, and the maximum brightness level is ‘100’.

Use case 2: Set the brightness to 420

Code:

ybacklight s420

Motivation: This use case is useful when you want to quickly set the brightness of your screen to a specific value.

Explanation: In this command, ‘ybacklight’ is the command name. ’s’ is the argument used to set the brightness level, followed by the desired brightness value (‘420’ in this case).

Example output: No output is displayed, but the screen brightness is set to ‘420’.

Use case 3: Increase the brightness by 42 big steps (4200 by default)

Code:

ybacklight Si42

Motivation: This use case is useful when you want to gradually increase the brightness of your screen by a specific amount.

Explanation: In this command, ‘ybacklight’ is the command name. ‘Si’ is the argument used to increase the brightness level, followed by the desired increase value (‘42’ in this case). The default step size is ‘100’, so this command will increase the brightness by 42 big steps, which is equivalent to 4200.

Example output: No output is displayed, but the screen brightness is increased by 42 big steps (4200).

Use case 4: Decrease the brightness by 300

Code:

ybacklight d300

Motivation: This use case is useful when you want to gradually decrease the brightness of your screen by a specific amount.

Explanation: In this command, ‘ybacklight’ is the command name. ’d’ is the argument used to decrease the brightness level, followed by the desired decrease value (‘300’ in this case).

Example output: No output is displayed, but the screen brightness is decreased by 300.

Conclusion

The ‘ybacklight’ command is a handy tool for managing screen backlight brightness. It provides various options to print the current and maximum brightness levels, set a specific brightness value, and increase or decrease the brightness by a certain amount. By understanding and utilizing these different use cases, you can better control and adjust the brightness of your screen to your liking.