Outputs packets as fast as they come back or 100 times per second, whichever is more. This provides a rapid display of how many packets are being dropped. Only the superuser may use this option.
Waits wait seconds between sending each packet.
The default is to wait for 1 second between each packet. If preload is specified, ping sends that many packets as fast as possible before falling into its normal mode of behavior. Only the superuser may use this option. Numeric output only. No attempt will be made to look up symbolic names for host addresses.