mongodb 修改用户密码 2种方法

> db.system.users.update({"_id" : ObjectId("529e67553992b24438d5e315")},{"user":"tank2","readOnly" : false,"pwd":"123"}) > db.system.users.find(); { "_id" : ObjectId("529e5f8474b4c660718a70f3"), "user" : "tank1", "readOnly" : false, "pwd" : "35dd47abff098f5b4f0b567db8edeac5" } { "_id" : ObjectId("529e67553992b24438d5e315"), "user" : "tank2", "readOnly" : false, "pwd" : "123" } //这样就不对了 

> db.addUser('tank2','111') {   "_id" : ObjectId("529e6f1c8d95afd190add450"),   "user" : "tank2",   "readOnly" : false,   "pwd" : "6b4334d2c97c526e6a11b2f9ce1996e0" } 

> db.changeUserPassword('tank2','test');