xargs:tldr:555bd  
        This command is a Unix/Linux command that performs the following actions:
- 
${arguments_source}: This is a placeholder that represents the source of arguments that will be passed to the command. It can be a file, standard input, or any other source of input arguments. - 
|: This symbol is a pipe operator. It is used to redirect the output of the previous command (in this case, the${arguments_source}) as input to the next command. - 
xargs: It is a command that takes input from standard input and executes a command using the input as arguments. - 
-P ${max-procs}: This option afterxargsspecifies the maximum number of processes/threads that can be run in parallel.${max-procs}is a placeholder for the desired number of parallel processes. - 
${command}: This is a placeholder that represents the command that will be executed using the arguments passed from${arguments_source}. It can be any command or script that accepts arguments. 
In summary, the command takes input arguments from ${arguments_source}, pipes them as input to xargs, which then executes ${command} in parallel using ${max-procs} number of processes.