I think I'm just down to the regular expression I need for finding the line in the hosts file

192.168.1.45 hostname.domain.com hostname

so it can be replaced with the new values. Unfortunately, I am bound by the modules that already exist within the Perl build on the laptops and that does not include Regex so I can't use $RE{net}{IPv4}. In the following segment of the script I have the expression to verify that there are four octets and that they are in the correct potential ranges:

if( $vmServerIP =~ m/^(\d\d?\d?)\.(\d\d?\d?)\.(\d\d?\d?)\.(\d\d?\d?)/ 
+){
    if($1 <= 255 && $2 <= 255 && $3 <= 255 && $4 <= 255){
      open (my $oldhfile, ,'<', $hfilepath) or die "Could not open $hf
+ilepath for reading.";
      my @hfile = <$oldhfile>;

[download]

However, I'm having issues with formulating the regular expression in the foreach loop if anyone could provide me with some guidance.

      foreach $hfileline (@hfile) {
           next unless $hfileline =~/^\s*\s+$hNames/;
           $hfileline = "$vmServerIP       $hNames\n";            
      }

[download]

TIA

-nas

In reply to regular expression assistance by notasaint

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