http://blog.chinaunix.net/uid-28595538-id-4987410.html
1.js
db=db.getSiblingDB("admin"); db.auth("root","111111"); db.changeUserPassword("root","123456"); print("password updated successfully!");
2.js
db=db.getSiblingDB("admin"); db.auth("root","111111"); var strInfo; strInfo=db.getCollectionNames(); print(tojson(strInfo)); db.system.users.find(); strInfo=db.runCommand({usersInfo:"root"}); print(tojson(strInfo)); strInfo=db.getUser("root"); print(tojson(strInfo));