screenkey:tldr:b9da5

The command you provided is a Linux shell command that uses two different programs, slop and screenkey, together.

Here's an explanation of each part of the command:

1. slop -n -f '%g': This part of the command runs the slop program and specifies some options. slop is a tool for selecting an area on the screen and outputting its geometry (width and height). The options -n tells slop not to print the selected rectangle, and -f '%g' specifies the format of the output, it will only print the geometry.

2. ${$(slop -n -f '%g')}: The $() syntax is used to capture the output of the slop command and substitute it in place. So this part replaces ${$(slop -n -f '%g')} with the output of slop command, which is the width and height of the selected area on the screen.

3. screenkey --position fixed --geometry ${$(slop -n -f '%g')}: This part of the command runs the screenkey program with options --position fixed and --geometry. screenkey is a tool that displays key presses on the screen, useful for screen recordings or presentations. --position fixed specifies that the key display should be fixed on a certain position, and --geometry specifies the size and position of the key display on the screen.

Overall, this command is used to execute screenkey with a fixed position and size on the screen, using the output of slop to determine the position and size dynamically based on the selected area.