in reply to how to save result in multiple files using for loop in perl
for looping through the array, you dont really need the index unless your doing something special with the data, I am assuming what you want to do but for your loop at the end here is what I suggest:
close FILE;#dont forget to close your file
system("ssh a.AS1 tracerout $dude[$i] > file $i.txt");
not sure why you used the + sign, maybe your looking for the . that connects strings ? and your use of $0 is also confusing because it is the path to the perl script itself.. this could not be used as an index. possibly you ment to say $dude[$o] which would make a lot more sense. but your problem is that the correct way to index an array is by putting it into scalar context ( $dude[$i] ) because the bit of information your taking from the array is flat data you begin it with a dollar sign instead of the @.
FIXED: length(@dude) to scalar(@dude) thanks jethro