Hi,
Thanks a lot for all your help.
I am a new comer to this area.
I tried to write a program without any module.
In future i would like to edit the file according the brand.
I tried to write a code as follow...

$inputfiletoread = "/config/apollo_logins.cfg";

&Read_Config_File($inputfiletoread);


sub Read_Config_File
{
 
    my($inputfiletoread,
           ) = @_;

    chomp($inputfiletoread);
 
    if ( -e "$inputfiletoread")

    {
        
        
    open ( ReadFile , $inputfiletoread); 

    flock( ReadFile, LOCK_EX);
        @readlines = <ReadFile>;

    foreach $readentirefile(@readlines)
        {
    #If Line Begins Pound Symbol(#) Skip To The Next Line;
    next if $readentirefile =~ s/^#//; 

    #Check For Line Beginning And Ends With Square Brackets;
    if ($readentirefile =~ m/^\[/)  {
    if ($readentirefile =~ m/\]+$/) {
    #Storing the string within [ ] in to string storegroupname;
        $storegroupname = $readentirefile;
        $storegroupname =~ s/^\[//;
    $storegroupname =~ s/\]+$//;
                    
                
                    }
                    }

    #If Line is Blank Skip To Next Line;
    next if $readentirefile =~ s/^$//;

    #Splitting The Lines INTO Fields using Delimiter; 
        next if $readentirefile =~ m/^\[/;   
    my($optionname, $optionvalue) = split(/=/, $readentirefile);
 
#print "HERE Key=$optionname Val=$optionvalue\n";
             }
    flock (ReadFile, LOCK_UN);
    close ReadFile;
    }
    else

    {
    #Error: To Be Written To Log Manager
        #print " The Path - Name Doesnt Exists \n";  
    
    exit();
    }
}
[download]

Thanks a lot... i will follow your suggestion and hope i can ask doubt regarding this..
Regards,
Suresh