sm:tldr:34968
This command does not follow standard syntax and may not work as expected. However, it seems to attempt to execute two separate commands together using a pipe symbol (|).
The first part of the command, ${echo "Hello World!"}, seems to be attempting to use variable substitution syntax (${}) to execute the echo command and print the message "Hello World!".
The second part of the command, sm -, is unclear without knowing the specific purpose or context of the sm command. It might be a placeholder for a valid command or an abbreviation for a specific program.
Overall, the command appears to attempt to print "Hello World!" and then pipe the output of that command into something called sm, but without more information about the sm command, it is impossible to determine the intended behavior.