What command was used on the host 192.168.123.5, to generate this output?

Running tcpdump -nli eth1 ‘icmp’ shows the following output: 11:56:35.599063 IP
192.168.123.5 > 194.25.2.129: icmp 64: echo request seq 1 11:56:35.670910 IP
194.25.2.129 > 192.168.123.5: icmp 64: echo reply seq 1 What command was used on the
host 192.168.123.5, to generate this output?

A.
ping