/ # -c CNT Send only CNT pings
-sh: -c: not found
/ # -s SIZE Send SIZE data bytes in packets (default=56)
-sh: syntax error: unexpected "("
/ # -I iface/IP Use interface or IP address as source
-sh: -I: not found
/ # -W timeout Seconds to wait for the first response (default:10)
-sh: syntax error: unexpected "("