Xargs -0 pipes standard input into just one argument. This argument is passed to the bash executable which sends a "duplicate to clipboard" request to klipper working with qdbus. The pipe to /dev/null is to not print the newline character returned by qdbus to the console. “The website templates are https://petskyonline-onlinestrore.blogspot.com/2025/07/the-day-my-cat-got-automatic-feeder-and.html