I learned perl and did not use for a long time. Now i have a problem, i hope you can show me to edit the code and make it work. I have a iplist.txt , when a system boot up, it will write IP , hotsname to iplist.txt 
10.31.61.230,fall11,Thu 03/30/2011 15:20:46.70
10.31.61.212,spring96,Thu 03/30/2011 15:19:56.89
10.31.61.230,spring96,Thu 03/31/2011 15:40:46.70
10.31.61.230,winter11,Thu 03/31/2011 15:40:46.70

Because IP will change and hostname can be change too because it has d
+ifferent windows OS
How do i get new log with the latest info ? like latestip.txt
Now
10.31.61.230,fall11,Thu 03/30/2011 15:20:46.70
change hostname the next day so i have to keep new hostname and ip add
+ress
10.31.61.230,winter11,Thu 03/31/2011 15:40:46.70

If we have IP change from
10.31.61.212,spring96,Thu 03/30/2011 15:19:56.89
to
10.31.61.230,spring96,Thu 03/31/2011 15:40:46.70
then keep the new IP address and hostname
10.31.61.230,spring96,Thu 03/31/2011 15:40:46.70

so it will create new file and
this new log latestip.txt will be

10.31.61.230,winter11,Thu 03/31/2011 15:40:46.70
10.31.61.230,spring96,Thu 03/31/2011 15:40:46.70

[download]
#viewip.pl


#print "content-type: text/html\n\n";

use Time::Local;
$today = timelocal(localtime);

$datafile=`cat ../hosts/iplist.txt | sort -r | sort -u -t ',' -k 2,2 >
+ ../hosts/latestip.txt`;

       
  
 
  my $count = 0;
  

open (DATA,"/home/myplace/hosts/latestip.txt") || die ("Can't Open dat
+a File \n");
@data=<DATA>;
close DATA;

&header_response;
$x=0;
foreach $line (@data) {
    
    $x++;
    ($ip, $hostname , $datetime)=split(/\,/,$line);
    

    print "<TD BGCOLOR='d3d3d3'>$hostname</TD><TD BGCOLOR='d3d3d3'>$ip
+&nbsp;</TD><TD BGCOLOR='d3d3d3'>$datetime&nbsp;</TD></TR> \n";
     $count++;
}

&footer_response;

######################################################################
+##############################


sub header_response
{
    print "Content-type: text/html\n\n";
    print "<HTML><HEAD><TITLE>test</TITLE>\n";
    print "</HEAD>\n";
    print qq^<BODY background="images/bg2.jpg" TEXT="blue" LINK="blue"
+ VLINK="#9900CC" ALINK="#330066">\n^;
    print "<CENTER><h1><font color=black>Our IP Info</font></h1></CENT
+ER>\n";
    print "<BR>\n";
    
    print "</form></CENTER>\n";
    
    
    print "<center><FONT size=+1><TABLE BORDER=1><TR bgcolor=#669900><
+TD><center><font color=white>Host Name</center></TD><TD><center><font
+ color=white>IP address</center></TD><TD><font color=white><center>La
+st Boot Windows</center></TD></TR>\n\n";
    return;
}

sub footer_response
{

    print "</TABLE></font></CENTER>\n";
    print "<BR><BR><BR><BR>\n";
    
        print "    </BODY></HTML>\n";
    return;
}

[download]
Thanks for teaching me.

In reply to How to get latest IP and hostname. by britney

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.