MongoDB Installation On CentOS7

# add yum-source
vim /etc/yum.repos.d/mongodb-org-4.0.repo
i                       # into insert mode
[Esc]                   # quit insert mode
:wq                     # save file

# mongodb-org-4.0.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

# install mongodb
yum install mongodb-org

# remove yum-source
rm -rf /etc/yum.repos.d/mongodb-org-4.0.repo
 
# config mongodb
vim /etc/mongod.conf
bindIp: 127.0.0.1 ==> bindIp: 0.0.0.0

# start mongo server
systemctl enable mongod            # auto start while booting
systemctl start mongod[.service]   # start mongo server
systemctl stop mongod[.service] 
systemctl status mongod[.service] 
systemctl stop firewalld.service   # stop firewall
systemctl disable firewalld.service # disable firewall while booting
whereis mongod

# start mongo client
mongo
# quit mongo client
quit()
# MongoDB的账号密码不是全局的, 而是每个库都要单独设置, 暂不设置