localhost
      AMD External Events Utility
      aspnet_state
      SensrSvc
      CryptSvc
[download]

Maybe it's whitespace in the file, try this

#!perl
use strict;
use autodie;
use Win32::Service qw'GetServices GetStatus';

my @state_name =  qw( UNKNOWN Stopped START_PENDING STOP_PENDING
                      Started CONTINUE_PENDING PAUSE_PENDING
                      PAUSED  ERROR  );

my $filename = '/Perl/XiServiceList.txt';
open FILE, '<', $filename;# autodie
my $hostname = <FILE>;
chomp $hostname;

print "Checking Services available for '$hostname'\n";
my %available=();
GetServices($hostname,\%available) or die "$!";

# add short names
$available{$_} = $_ for values %available;

print "Checking services in list\n";
while (<FILE>){
  # trim leading and trailing whitespace
  s/^\s+|\s+$//g;
  if (exists $available{$_}){
    my $shortname = $available{$_};
    my %status;
    GetStatus($hostname, $shortname, \%status);
    my $state_no = $status{'CurrentState'};
    printf  " ServiceStatus: %s %s %s \n", 
        $hostname, $shortname, $state_name[$state_no]; 
    
  } else {
    print "-- ERROR -- '$_' status not avaiable\n";
  }
}
close FILE;
[download]

poj

awesome! Thank you. This is working.

I am adding  while(){sleep(30);} in order to have status checked every 30 seconds. but it is just stopping there after the first time check.

#!perl
use strict;
use autodie;
use Win32::Service qw'GetServices GetStatus';

my @state_name =  qw( UNKNOWN Stopped START_PENDING STOP_PENDING
                      Started CONTINUE_PENDING PAUSE_PENDING
                      PAUSED  ERROR  );

my $filename = '/Users/tyang/Documents/Traning/Perl/XiServiceList.txt'
+;
open FILE, '<', $filename;# autodie
my $hostname = <FILE>;
chomp $hostname;

print "Checking Services available for '$hostname'\n";
my %available=();
GetServices($hostname,\%available) or die "$!";

# add short names
$available{$_} = $_ for values %available;

print "Checking services in list\n";
while()
{ sleep(30);
while (<FILE>){
  # trim leading and trailing whitespace
  s/^\s+|\s+$//g;
  if (exists $available{$_}){
    my $shortname = $available{$_};
    my %status;
    GetStatus($hostname, $shortname, \%status);
    my $state_no = $status{'CurrentState'};
    printf  " ServiceStatus: %s %s %s \n", 
        $hostname, $shortname, $state_name[$state_no]; 
    
  } else {
    print "-- ERROR -- '$_' status not avaiable\n";
  }
}

}
[download]