note 40631 added to function.system

I am having problem in executing Linux command (useradd) which does not have any respond and when I run my try.php, it shows that my username is apache by using "whoami", is this the right username? Can somebody please help me with that problem, greatly appreciate for the kindness! ---- Manual Page -- http://www.php.net/manual/en/function.system.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+40631 Delete -- http://master.php.net/manage/user-notes.php?action=delete+40631&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+40631&report=yes Search -- http://master.php.net/manage/user-notes.php