守护程序未在启动时运行

在Ubuntu（14.04）VM上，我有一个要在启动时运行的简单节点服务器。以下脚本与一样被调用时有效./noderoot start，但是在启动时未运行。该脚本是

#!/bin/sh
### BEGIN INIT INFO
# Provides: noderoot
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: bootin and rootin
# Description: Start root server on boot
### END INIT INFO
export PATH=$PATH:/usr/bin
export NODE_PATH=$NODE_PATH:/home/azureuser/npm/bin

case "$1" in
  start)
    forever --sourceDir=/var/www/root -p /var/www/logs app.js
  ;;
  stop)
    forever stop --sourceDir=/var/www/root app.js
  ;;
  *)
    echo "Usage: /etc/init.d/noderoot {start|stop}"
    exit 1
  ;;
esac

exit 0

该脚本包含在/etc/init.d其中755以获取权限。我尝试运行update-rc.d以下结果：

root@linux-dev:~# update-rc.d noderoot defaults 80
 Adding system startup for /etc/init.d/noderoot ...
   /etc/rc0.d/K80noderoot -> ../init.d/noderoot
   /etc/rc1.d/K80noderoot -> ../init.d/noderoot
   /etc/rc6.d/K80noderoot -> ../init.d/noderoot
   /etc/rc2.d/S80noderoot -> ../init.d/noderoot
   /etc/rc3.d/S80noderoot -> ../init.d/noderoot
   /etc/rc4.d/S80noderoot -> ../init.d/noderoot
   /etc/rc5.d/S80noderoot -> ../init.d/noderoot
root@linux-dev:~# update-rc.d noderoot enable
update-rc.d: warning:  start runlevel arguments (none) do not match noderoot Default-Start values (2 3 4 5)
update-rc.d: warning:  stop runlevel arguments (none) do not match noderoot Default-Stop values (0 1 6)
 Enabling system startup links for /etc/init.d/noderoot ...
 Removing any system startup links for /etc/init.d/noderoot ...
   /etc/rc0.d/K80noderoot
   /etc/rc1.d/K80noderoot
   /etc/rc2.d/S80noderoot
   /etc/rc3.d/S80noderoot
   /etc/rc4.d/S80noderoot
   /etc/rc5.d/S80noderoot
   /etc/rc6.d/K80noderoot
 Adding system startup for /etc/init.d/noderoot ...
   /etc/rc0.d/K80noderoot -> ../init.d/noderoot
   /etc/rc1.d/K80noderoot -> ../init.d/noderoot
   /etc/rc6.d/K80noderoot -> ../init.d/noderoot
   /etc/rc2.d/S80noderoot -> ../init.d/noderoot
   /etc/rc3.d/S80noderoot -> ../init.d/noderoot
   /etc/rc4.d/S80noderoot -> ../init.d/noderoot
   /etc/rc5.d/S80noderoot -> ../init.d/noderoot

据我所知，这成功完成了。我可以通过运行启动服务sudo service noderoot start。但是，计算机重新启动时，我的可执行文件未运行。有什么方法可以解决正在发生的事情吗？是否有任何特定的日志文件可以阐明如何解决此问题？