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open CMD, "/bin/ping -c $count -i $interval -s $packetsize -w $allowab
+leTime $host |" or die "Can't open ping: $!";
 while (<CMD>) {
my (@values1,@val1,@values2,@val2,$val) = 0; 
...
    print "$values1[1] \n";
    print "$val1[0] \n";
}

Use of uninitialized value $val in concatenation (.) or string at ./pi
+ng_linux.pl line 69, <CMD> line 2.