shell ping

#!/bin/bashPATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/binexport PATHip=\"192.168.11.\"for i in `seq 100 110`doping -w 1 -c 1 \"$ip$i\" &>/dev/nullif [[ $? == 0 ]]thenecho \"$ip$i is up\" >>/tmp/1.txtelseecho  \"$ip$i is down\" >>/tmp/1.txtfidone