xrandr:tldr:4b3c8

The command "xrandr --output ${LVDS1} --brightness ${0-5}" is used to adjust the brightness level of the specified display output (${LVDS1}) using the xrandr (X Resize and Rotate) command-line tool.

Here's a breakdown of the command:

• "xrandr" is the command-line tool in Linux/Unix systems used for managing display settings.
• "--output" is an option followed by the name of the display output to be adjusted.
• "${LVDS1}" is a variable representing the name of the display output. The actual value of this variable needs to be defined somewhere in the script or command line.
• "--brightness" is another option used to set the brightness level.
• "${0-5}" is a variable representing a range of values between 0 and 5 for the brightness level. Again, the actual value of this variable needs to be defined somewhere before running the command.

In summary, this command will change the brightness of the specified display output (${LVDS1}) to a value specified in the range of 0 to 5 (${0-5}). The specific brightness level within that range depends on the value assigned to the variable.