Ping can only send ICMP packets to one host at a time. If I want to test how many hosts in a Class C network are alive or I want to pick an unassigned IP address for other purpose, ping can not quickly help me.
To overcome the problem, I turn to fping which can send ICMP packets to multiple hosts :
% fping < target_files
(list of holes are stored in target_files)
To ping a Class C network :
%fping -g 192.168.1.0/24
or use
% fping -g 192.168.1.0 192.168.1.255
A handy tool, isn't it ?
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