mongodb安裝就不說了，請參考：centos yum 安裝 mongodb 以及php擴(kuò)展

一，創(chuàng)建，切換，刪除數(shù)據(jù)庫

[root@localhost zhangy]# mongo 
MongoDB shell version: 2.4.6 
connecting to: tank 
> use test      //創(chuàng)建 or 切換數(shù)據(jù)庫 
switched to db test 
> db.dropDatabase()  //刪除數(shù)據(jù)庫 
{ "dropped" : "test", "ok" : 1 }