(fping is a program similar to ping(1) (ping(1) replies to requests to detect the presence of a host via the ICMP (Internet Control Message Protocol) protocol). The difference between Fping and ping is that you can specify a range of the number of hosts to be pinged on the command line, or you can specify a file containing a list of hosts to be pinged. Unlike ping, which waits for a certain host to connect to timeout or send back feedback information, after fping sends a data packet to one host, it immediately sends a data packet to the next host to realize multi-host ping together. If a host is pinged, the host will be marked and removed from the waiting list. If it is not pinged, it means that the host cannot be reached, and the host remains in the waiting list, waiting for subsequent operations.)
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