MongoDB-4.2.2 installed and configured the account password to access

0. purpose

Download and install MongoDB, set a password to access.
MongoDB network will download the installation package of three official
mongodb-org-server-4.2.2-1.el6.x86_64.rpm #MongoDB services, configuration files, startup scripts
mongodb-org-shell-4.2.2-1.el6. x86_64.rpm # shell comprising mongo operation command related
tools mongodb-org-tools-4.2.2-1.el6.x86_64.rpm # MongoDB for backup, Analytical

1. Install the server

# rpm -ivh mongodb-org-server-4.2.2-1.el6.x86_64.rpm
# /etc/init.d/mongod start
starting mongod:           [OK]

2. Install the command line used to log mongodb

# rpm -ivh mongodb-org-shell-4.2.2-1.el6.x86_64.rpm
# mongo
> show dbs;
admin   0.000GB
config  0.000GB
local   0.000GB

3. Set the administrator password MongoDB

> use admin
switched to db admin
> db.createUser({ user: "admin", pwd: "test123", roles: [{ role: "userAdminAnyDatabase", db: "admin" }] })
Successfully added user: {
    "user" : "admin_root",
    "roles" : [
        {
            "role" : "userAdminAnyDatabase",
            "db" : "admin"
        }
    ]
}
##验证登录，如果返回1，则证明密码生效
> db.auth("admin", "test123") 
1

4. Create a library db test, and assign the account number and password ****

#登录管理员
> use admin
> db.auth("admin","test123")
#创建test库
> use test
> db.createUser({ user: "test", pwd: "test123", roles: [{ role: "dbOwner", db: "test" }] })
Successfully added user: {
    "user" : "test",
    "roles" : [
        {
            "role" : "dbOwner",
            "db" : "test"
        }
    ]
}

#程序调用以下链接即可：mongodb://test:test123@localhost/test

Operation and maintenance of some of the fault can not start

1. After service restart, there will not be a problem to open and look for log is as follows

# /etc/init.d/mongod start
starting mongod:           [FAILED]

# tail -f /var/log/mongdb/mongod.log
2019-12-25T10:43:44.336+0800 I  CONTROL  [initandlisten]     distarch: x86_64
2019-12-25T10:43:44.336+0800 I  CONTROL  [initandlisten]     target_arch: x86_64
2019-12-25T10:43:44.336+0800 I  CONTROL  [initandlisten] options: { config: "/etc/mongod.conf", net: { bindIp: "127.0.0.1", port: 27017 }, processManagement: { fork: true, pidFilePath: "/var/run/mongodb/mongod.pid", timeZoneInfo: "/usr/share/zoneinfo" }, storage: { dbPath: "/var/lib/mongo", journal: { enabled: true } }, systemLog: { destination: "file", logAppend: true, path: "/var/log/mongodb/mongod.log" } }
2019-12-25T10:43:44.336+0800 E  NETWORK  [initandlisten] Failed to unlink socket file /tmp/mongodb-27017.sock Operation not permitted
2019-12-25T10:43:44.336+0800 F  -        [initandlisten] Fatal Assertion 40486 at src/mongo/transport/transport_layer_asio.cpp 693
2019-12-25T10:43:44.336+0800 F  -        [initandlisten] 

***aborting after fassert() failure

Solution:

# rm -fr /tmp/mongodb-27017.sock
# /etc/init.d/mongod start
starting mongod:           [OK]