print "generating demo server certificate\n";
my $cmd = ['openssl', 'req', '-batch', '-x509', '-newkey', 'rsa:4096',
'-nodes', '-keyout', $cert_file, '-out', $cert_file,
- '-subj', "/CN=Simple Demo Server/OU=$nodename/",
+ '-subj', "/CN=$nodename/",
'-days', '3650'];
run_command($cmd);
}