Emergency UNIX and Linux Support

#!/usr/bin/perl
use LWP::UserAgent;

my $ua = LWP::UserAgent->new(agent => q{Mozilla/5.0 (Windows; U;  Windows NT 6.0; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET  CLR 3.5.30729)});
$ua->cookie_jar({});

print("Specify site URL(e.g http://site.com/): ");
chomp(my $url = <>);
print("Username: ");
chomp(my $username = <>);
print("Password: ");
chomp(my $password = <>);

my $req = HTTP::Request->new(POST => $url . '/login.php?do=login');
$req->content_type('application/x-www-form-urlencoded');
$req->content("vb_login_username=$username&vb_login_password=$password&do=login&securitytoken=guest&vb_login_md5password=&vb_login_md5password_utf=&s=");
$ua->request($req);
my $content = $ua->get("$url/index.php")->content;
my ($securityToken) = $content =~ /value="\w{10}-\w{40}" /g;
print "Security token: $securityToken\n";

my $content = $ua->get("$url/index.php")->content;

print $content, "\n";