连接到MongoDB实例

 mongo --host 192.168.1.27:27017 --authenticationDatabase admin -u root -p
或者
 mongo --host 192.168.1.27 --port 27017 -u root -p --authenticationDatabase admin

添加用户

-副本集打开安全认证前，添加管理员和集群管理员的命令

mongo --eval 'db.getSiblingDB("admin").createUser( { user: "admin", pwd: "ganluchang", roles: [ { role: "userAdminAnyDatabase", db: "admin" } ] })'

mongo --eval 'db.getSiblingDB("admin").createUser( { user: "clusteradmin", pwd: "ganluchang", roles: [ { role: "clusterAdmin", db: "admin" } ] })'

-添加读写权限用户

db.getSiblingDB("admin").createUser( { user: "glc", pwd: "ganluchang", roles: [ { role: "readWriteAnyDatabase", db: "admin" } ] })

-查看用户

use admin
show users

同一实例内复制库操作