Below I have while loop which loop through each line at a time, I was wondering if there is any possibility to reduce the lines of code, less code doing same process like below? 
while ($line = <DATA>)
    {
        if ($line =~ /WNT/ || $line =~ /UNX/)
        {
            print "$line\n";
        }
        if ($flag)
        {
            if ($target_db ne 'sql')
            {
                next if ($line =~ /$target_db/i);
            }
            else
            {
                next if ($line =~ /informix/i || $line =~ /oracle/i)
            }
            print $FH "$line";
            if ($line =~ /$target_os/)
            {
                undef $flag;
                next;
            }
        }
        if ($line =~ /UNX/ || $line =~ /WNT/ || $line =~ /COMPONENT/)
        {
           if(!(defined $flag))
           {
                $flag = 1;
                print $FH "$line";
           }
        }
    }

[download]
Cheers!

In reply to Looking for less code by Sun751

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.