ybacklight:tldr:5cc4e

The command "ybacklight d${300}" is likely attempting to control the brightness of a display using the program "ybacklight" and set it to a specific value.

Here is a breakdown of the command:

• "ybacklight": This is the name of the program or command that is designed to control the backlight brightness of displays in a Linux-based system.
• "d": This could be an argument or option specified by the "ybacklight" program to define that the next value provided is for the display brightness.
• "${300}": This is likely a variable or a value being passed to the "d" option. In this case, it is set to 300. It indicates that the desired brightness level should be set to 300.

Overall, the command aims to use the "ybacklight" program to adjust the display's brightness to a value of 300. The exact functionality and behavior might vary depending on the specific implementation of the "ybacklight" program.