mongodb下载：

https://www.mongodb.com/download-center?jmp=nav#community

windows下安装mongodb:

打开上面网址，点Community Server 然后点windows下，下载后点下一步安装即可；

centos7.14下安装mongodb:

采用的yum方式安装：

[root@localhost /]# cd etc/yum.repos.d/

建一个mongodb.repo文件，内容如下：

[mongodb-org]

name=MongoDB Repository

baseurl=https://mirrors.tuna.tsinghua.edu.cn/mongodb/yum/el$releasever/

gpgcheck=0

enabled=1

然后执行：

[root@localhost yum.repos.d]# yum install mongodb-org

启动：

[root@localhost yum.repos.d]# service mongod start

Starting mongod (via systemctl):                           [  确定  ]

查看是否启动成功（默认27017端口):

[root@localhost yum.repos.d]# netstat -ntlp

Active Internet connections (only servers)

Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    

tcp        0      0 127.0.0.1:27017         0.0.0.0:*               LISTEN      1329/mongod         

tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1018/sshd           

tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1118/master         

tcp6       0      0 :::22                   :::*                    LISTEN      1018/sshd           

tcp6       0      0 ::1:25                  :::*                    LISTEN      1118/master         

[root@localhost yum.repos.d]# 

如果需要外网访问，记得关防火墙：

service firewalld stop

配置文件地址：

[root@localhost yum.repos.d]# whereis mongod

mongod: /usr/bin/mongod /etc/mongod.conf /usr/share/man/man1/mongod.1

连接：

[root@localhost yum.repos.d]# mongo 127.0.0.1:27017

MongoDB shell version: 3.2.20

connecting to: 127.0.0.1:27017/test

Welcome to the MongoDB shell.

For interactive help, type "help".

For more comprehensive documentation, see

http://docs.mongodb.org/

Questions? Try the support group

http://groups.google.com/group/mongodb-user

Server has startup warnings: 

2018-08-01T22:36:15.924+0800 I CONTROL  [initandlisten] 

2018-08-01T22:36:15.924+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2018-08-01T22:36:15.924+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2018-08-01T22:36:15.924+0800 I CONTROL  [initandlisten] 

2018-08-01T22:36:15.924+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2018-08-01T22:36:15.924+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2018-08-01T22:36:15.924+0800 I CONTROL  [initandlisten] 

2018-08-01T22:36:15.924+0800 I CONTROL  [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 4096 processes, 64000 files. Number of processes should be at least 32000 : 0.5 times number of files.

2018-08-01T22:36:15.924+0800 I CONTROL  [initandlisten] 

> show dbs

local  0.000GB

> 

如果连接时报上面的错误，解决办法：

https://blog.csdn.net/u013075468/article/details/51471033

[root@localhost soft]# echo "never" > /sys/kernel/mm/transparent_hugepage/enabled

[root@localhost soft]# echo "never" >  /sys/kernel/mm/transparent_hugepage/defrag

[root@localhost soft]# vim /etc/security/limits.conf

添加：

mongod  soft  nofile  64000 mongod  hard  nofile  64000 mongod  soft  nproc  32000 mongod  hard  nproc  32000

重启：service mongod restart