1、vi /etc/yum.repos.d/mongodb-org.repo
[mongodb-org-4.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.0/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.0.asc
2、yum update
3、yum install mongodb-org -y
4、查看并启动mongodb，并将服务设置为开机自启动
systemctl status mongod
systemctl start mongod
systemctl enable mongod
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db.createUser( { user: "root", pwd: "pwd", roles: [ { role: "userAdminAnyDatabase", db: "admin" } ] } )
mongo -u "root" -p
db.system.users.find();
db.changeUserPassword('root','pwd1')
use admin
db.auth('root','pwd1')
