How to use the command backlight_control (with examples)

Backlight_control is a command that allows users to control the backlight of a Linux machine using percentage values. This command is particularly useful for adjusting the brightness of the screen to optimize visibility and conserve battery life. By specifying a specific percentage count, users can either increase or decrease the backlight strength, as well as set it to a specific level.

Use case 1: Increase/decrease the backlight by a specific percent count

Code:

backlight_control +|-5

Motivation: This use case is useful when you want to incrementally adjust the backlight strength by a specific percentage count. For example, if the screen is too bright, you can decrease the backlight by 5%, or if the screen is too dim, you can increase the backlight by 5%.

Explanation: The + or - symbol followed by a number represents the incremental percentage count by which the backlight will be adjusted. The plus symbol signifies an increase, whereas the minus symbol signifies a decrease.

Example output: If the current backlight strength is 70% and you execute backlight_control +5, the output will increase the backlight strength to 75%.

Use case 2: Set the backlight strength to a specific percent count

Code:

backlight_control 90

Motivation: In certain situations, you may want to set the backlight strength to a specific level for consistent visibility or personal preference.

Explanation: In this use case, the numerical value provided represents the desired backlight strength in percentage. By specifying a specific number, the backlight will be adjusted accordingly.

Example output: If the current backlight strength is 80% and you execute backlight_control 90, the output will change the backlight strength to 90%.

Use case 3: Print the help

Code:

backlight_control

Motivation: This use case is helpful if you need a reminder of all the available options and usage of the backlight_control command.

Explanation: By executing the backlight_control command without any arguments, it triggers the help function which displays information about the command and its usage.

Example output: The output will contain information about the backlight_control command, including the available options, usage, and any additional relevant details.