you will need to of course to open() the file and read through it, here is open file and read through it 101...

open FH, "</path/to/myfilename" or die "cannot open myfilename $!\n";
while (<FH>) {
  #  process each line which is stored in this example in $_
  print $_;
}
[download]

Since you want to print in columns, I suspect you will profit from learing about split() and printf() (or sprintf() )

have fun!