#!/usr/bin/perl

use strict;
use warnings;                      # Always good to have.

print `uname -n`;

my $uname = `uname`;               # Only run "uname" once.
print `prtconf |grep Mem` if ($uname eq 'SunOS');
print `cat /proc/meminfo` if ($uname eq 'Linux');

my $use_dbi = eval("use DBI; 1");  # More concise than checking $@.
if ($use_dbi)
 {
  print "Hurray!!\n"; 
 }
else
 {
  print "NO DBI\n";
 }