Thanks Grandfather for replying.

#!/usr/bin/perl
open(FH , ">>/var/log/apache2/access.log") or die "cant";

print FH "This is test\n";

close(FH);
But it appends to the file access.log but this file is being used by the process of apache

root@cu:~# lsof|grep access.log
apache2 1115 www-data 8w REG 9,4 30362650 2719854 /var/log/apache2/access.log
apache2 1115 www-data 9w REG 9,4 30362650 2719854 /var/log/apache2/access.log
apache2 2773 www-data 8w REG 9,4 30362650 2719854 /var/log/apache2/access.log
apache2 2773 www-data 9w REG 9,4 30362650 2719854 /var/log/apache2/access.log

If this file is being used by apache I shouldn't have been able to append the file but I appended it

In reply to Re^2: file used by process by farhan
in thread file used by process by farhan

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.