fping

To ping all hosts in a network 192.168.2.0/24 use fping:

user@host:/home/user# fping -a -A -g 192.168.2.0/24 -q
192.168.2.1
192.168.2.2
192.168.2.7
192.168.2.8
192.168.2.9
192.168.2.51
192.168.2.55
192.168.2.59
192.168.2.70
192.168.2.98
user@host:/home/user#