It says in part:
Sending a USR1 signal to a running 'dd' process makes it print I/O statistics to standard error and then resume copying.$ dd if=/dev/zero of=/dev/null& pid=$! $ kill -USR1 $pid; sleep 1; kill $pid
I think it is trying to tell me what I need to know. But there is too much going on there, Guidance please. TIA
