mongodb的身份验证

Question

如何在输入启动命令时为mongodb添加身份验证：

root@NSBLR:/# mongo
MongoDB shell version: 3.0.1

connecting to: test

此外，服务器有启动警告：

2015-04-02T09:43:04.775+0530 I CONTROL  [initandlisten] 
2015-04-02T09:43:04.775+0530 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2015-04-02T09:43:04.775+0530 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2015-04-02T09:43:04.775+0530 I CONTROL  [initandlisten] 
2015-04-02T09:43:04.775+0530 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2015-04-02T09:43:04.775+0530 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2015-04-02T09:43:04.775+0530 I CONTROL  [initandlisten]