Comment by ddosmax556

For those that don't know what 'copy as regular file' means, it means the copy command opens any file as though it was a regular file. If you have a FIFO queue sitting around it will read the content of the FIFO queue - if nothing writes to it, the command will hang. If you do cp -r /dev/zero foo, it will write zeroes into foo until the disk is full. -R otoh will copy a fifo queue as a fifo queue.