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[#]: collector: (lujun9972)
[#]: translator: (geekpi)
[#]: reviewer: ( )
[#]: publisher: ( )
[#]: url: ( )
[#]: subject: (How to Install MongoDB on Ubuntu)
[#]: via: (https://itsfoss.com/install-mongodb-ubuntu)
[#]: author: (Sergiu https://itsfoss.com/author/sergiu/)
How to Install MongoDB on Ubuntu
======
**This tutorial presents two ways to install MongoDB on Ubuntu and Ubuntu-based Linux distributions.**
[MongoDB][1] is an increasingly popular free and open-source NoSQL database that stores data in collections of JSON-like, flexible documents, in contrast to the usual table approach youll find in SQL databases.
You are most likely to find MongoDB used in modern web applications. Its document model makes it very intuitive to access and handle with various programming languages.
![mongodb Ubuntu][2]
In this article, Ill cover two ways you can install MongoDB on your Ubuntu system.
### Installing MongoDB on Ubuntu based Distributions
1. Install MongoDB using Ubuntus repository. Easy but not the latest version of MongoDB
2. Install MongoDB using its official repository. Slightly complicated but you get the latest version of MongoDB.
The first installation method is easier, but I recommend the second method if you plan on using the latest release with official support.
Some people might prefer using snap packages. There are snaps available in the Ubuntu Software Center, but I wouldnt recommend using them; theyre outdated at the moment and I wont be covering that.
#### Method 1. Install MongoDB from Ubuntu Repository
This is the easy way to install MongoDB on your system, you only need to type in a simple command.
##### Installing MongoDB
First, make sure your packages are up-to-date. Open up a terminal and type:
```
sudo apt update && sudo apt upgrade -y
```
Go ahead and install MongoDB with:
```
sudo apt install mongodb
```
Thats it! MongoDB is now installed on your machine.
The MongoDB service should automatically be started on install, but to check the status type
```
sudo systemctl status mongodb
```
![Check if the MongoDB service is running.][3]
You can see that the service is **active**.
##### Running MongoDB
MongoDB is currently a systemd service, so well use **systemctl** to check and modify its state, using the following commands:
```
sudo systemctl status mongodb
sudo systemctl stop mongodb
sudo systemctl start mongodb
sudo systemctl restart mongodb
```
You can also change if MongoDB automatically starts when the system starts up ( **default** : enabled):
```
sudo systemctl disable mongodb
sudo systemctl enable mongodb
```
To start working with (creating and editing) databases, type:
```
mongo
```
This will start up the **mongo shell**. Please check out the [manual][4] for detailed information on the available queries and options.
**Note:** Depending on how you plan to use MongoDB, you might need to adjust your Firewall. Thats unfortunately more involved than what I can cover here and depends on your configuration.
##### Uninstall MongoDB
If you installed MongoDB from the Ubuntu Repository and want to uninstall it (maybe to install using the officially supported way), type:
```
sudo systemctl stop mongodb
sudo apt purge mongodb
sudo apt autoremove
```
This should completely get rid of your MongoDB install. Make sure to **backup** any collections or documents you might want to keep since they will be wiped out!
#### Method 2. Install MongoDB Community Edition on Ubuntu
This is the way the recommended way to install MongoDB, using the package manager. Youll have to type a few more commands and it might be intimidating if you are newer to the Linux world.
But theres nothing to be afraid of! Well go through the installation process step by step.
##### Installing MongoDB
The package maintained by MongoDB Inc. is called **mongodb-org** , not **mongodb** (this is the name of the package in the Ubuntu Repository). Make sure **mongodb** is not installed on your system before applying this steps. The packages will conflict. Lets get to it!
First, well have to import the public key:
```
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4
```
Now, you need to add a new repository in your sources list so that you can install MongoDB Community Edition and also get automatic updates:
```
echo "deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu $(lsb_release -cs)/mongodb-org/4.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list
```
To be able to install **mongodb-org** , well have to update our package database so that your system is aware of the new packages available:
```
sudo apt update
```
Now you can ether install the **latest stable version** of MongoDB:
```
sudo apt install -y mongodb-org
```
or a **specific version** (change the version number after **equal** sign)
```
sudo apt install -y mongodb-org=4.0.6 mongodb-org-server=4.0.6 mongodb-org-shell=4.0.6 mongodb-org-mongos=4.0.6 mongodb-org-tools=4.0.6
```
If you choose to install a specific version, make sure you change the version number everywhere. If you only change it in the **mongodb-org=4.0.6** part, the latest version will be installed.
By default, when updating using the package manager ( **apt-get** ), MongoDB will be updated to the newest updated version. To stop that from happening (and freezing to the installed version), use:
```
echo "mongodb-org hold" | sudo dpkg --set-selections
echo "mongodb-org-server hold" | sudo dpkg --set-selections
echo "mongodb-org-shell hold" | sudo dpkg --set-selections
echo "mongodb-org-mongos hold" | sudo dpkg --set-selections
echo "mongodb-org-tools hold" | sudo dpkg --set-selections
```
You have now successfully installed MongoDB!
##### Configuring MongoDB
By default, the package manager will create **/var/lib/mongodb** and **/var/log/mongodb** and MongoDB will run using the **mongodb** user account.
I wont go into changing these default settings since that is beyond the scope of this guide. You can check out the [manual][5] for detailed information.
The settings in **/etc/mongod.conf** are applied when starting/restarting the **mongodb** service instance.
##### Running MongoDB
To start the mongodb daemon **mongod** , type:
```
sudo service mongod start
```
Now you should verify that the **mongod** process started successfully. This information is stored (by default) at **/var/log/mongodb/mongod.log**. Lets check the contents of that file:
```
sudo cat /var/log/mongodb/mongod.log
```
![Check MongoDB logs to see if the process is running properly.][6]
As long as you get this: **[initandlisten] waiting for connections on port 27017** somewhere in there, the process is running properly.
**Note: 27017** is the default port of **mongod.**
To stop/restart **mongod** enter:
```
sudo service mongod stop
sudo service mongod restart
```
Now, you can use MongoDB by opening the **mongo shell** :
```
mongo
```
##### Uninstall MongoDB
Run the following commands
```
sudo service mongod stop
sudo apt purge mongodb-org*
```
To remove the **databases** and **log files** (make sure to **backup** what you want to keep!):
```
sudo rm -r /var/log/mongodb
sudo rm -r /var/lib/mongodb
```
**Wrapping Up**
MongoDB is a great NoSQL database, easy to integrate into modern projects. I hope this tutorial helped you to set it up on your Ubuntu machine! Let us know how you plan on using MongoDB in the comments below.
--------------------------------------------------------------------------------
via: https://itsfoss.com/install-mongodb-ubuntu
作者:[Sergiu][a]
选题:[lujun9972][b]
译者:[译者ID](https://github.com/译者ID)
校对:[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译,[Linux中国](https://linux.cn/) 荣誉推出
[a]: https://itsfoss.com/author/sergiu/
[b]: https://github.com/lujun9972
[1]: https://www.mongodb.com/
[2]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/03/mongodb-ubuntu.jpeg?resize=800%2C450&ssl=1
[3]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/02/mongodb_check_status.jpg?fit=800%2C574&ssl=1
[4]: https://docs.mongodb.com/manual/tutorial/getting-started/
[5]: https://docs.mongodb.com/manual/
[6]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/02/mongodb_org_check_logs.jpg?fit=800%2C467&ssl=1

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@ -0,0 +1,239 @@
[#]: collector: (lujun9972)
[#]: translator: (geekpi)
[#]: reviewer: ( )
[#]: publisher: ( )
[#]: url: ( )
[#]: subject: (How to Install MongoDB on Ubuntu)
[#]: via: (https://itsfoss.com/install-mongodb-ubuntu)
[#]: author: (Sergiu https://itsfoss.com/author/sergiu/)
如何在 Ubuntu 上安装 MongoDB
======
**本教程介绍了在 Ubuntu 和基于 Ubuntu 的 Linux 发行版上安装 MongoDB 的两种方法。**
[MongoDB][1]是一个越来越流行的免费和开源的 NoSQL 数据库,它将数据存储在类似 JSON 的灵活文档集中,这与 SQL 数据库中常见的表格形式形成对比。
你很可能发现在现代 Web 应用中使用 MongoDB。它的文档模型使得使用各种编程语言能非常直观地访问和处理它。
![mongodb Ubuntu][2]
在本文中,我将介绍两种在 Ubuntu 上安装 MongoDB 的方法。
### 在基于 Ubuntu 的发行版上安装 MongoDB
1. 使用 Ubuntu 仓库安装 MongoDB。简单但不是最新版本的 MongoDB
  2. 使用其官方仓库安装 MongoDB。稍微复杂但你能得到最新版本的 MongoDB。
第一种安装方法更容易,但如果你计划使用官方支持的最新版本,那么我建议使用第二种方法。
S有些人可能更喜欢使用 snap 包。Ubuntu 软件中心提供了 snap但我不建议使用它们因为现在已经过时了因此我这里不会提到。
#### 方法 1从 Ubuntu 仓库安装 MongoDB
这是在系统中安装 MongoDB 的简便方法,你只需输入一个命令即可。
##### 安装 MongoDB
首先,确保你的包是最新的。打开终端并输入:
```
sudo apt update && sudo apt upgrade -y
```
继续安装 MongoDB
```
sudo apt install mongodb
```
这就完成了MongoDB 现在安装到你的计算机上了。
MongoDB 服务应该在安装时自动启动,但要检查服务状态:
```
sudo systemctl status mongodb
```
![Check if the MongoDB service is running.][3]
你可以看到该服务是**活动**的。
##### 运行 MongoDB
MongoDB 目前是一个 systemd 服务,因此我们使用 **systemctl** 来检查和修改它的状态,使用以下命令:
```
sudo systemctl status mongodb
sudo systemctl stop mongodb
sudo systemctl start mongodb
sudo systemctl restart mongodb
```
你也可以修改 MongoDB 是否自动随系统启动(**默认**:启用):
```
sudo systemctl disable mongodb
sudo systemctl enable mongodb
```
要开始使用(创建和编辑)数据库,请输入:
```
mongo
```
这将启动 **mongo shell**。有关查询和选项的详细信息,请查看[手册][4]。
**注意:**根据你计划使用 MongoDB 的方式,你可能需要调整防火墙。不幸的是,这超出了本篇的内容,并且取决于你的配置。
##### 卸载 MongoDB
如果你从 Ubuntu 仓库安装 MongoDB 并想要卸载它(可能要使用官方支持的方式安装),请输入:
```
sudo systemctl stop mongodb
sudo apt purge mongodb
sudo apt autoremove
```
这应该会完全卸载 MongoDB。确保**备份**你可能想要保留的任何集合或文档,因为它们将被删除!
#### 方法 2在 Ubuntu 上安装 MongoDB 社区版
这是推荐的安装 MongoDB 的方法,它使用包管理器。你需要多打几条命令,对于 Linux 新手而言,这可能会感到害怕。
但没有什么可怕的!我们将一步步说明安装过程。
##### 安装 MongoDB
由 MongoDB Inc. 维护的包称为 **mongodb-org** ,而不是 **mongodb**(这是 Ubuntu 仓库中包的名称)。在开始之前,请确保系统上未安装 **mongodb**。因为包之间会发生冲突。让我们开始吧!
首先,我们必须导入公钥:
```
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4
```
现在,你需要在源列表中添加一个新的仓库,以便你可以安装 MongoDB 社区版并获得自动更新:
```
echo "deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu $(lsb_release -cs)/mongodb-org/4.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list
```
为了安装 **mongodb-org**,我们需要我们的包数据库,以便系统知道可用的新包:
```
sudo apt update
```
现在你可以安装**最新稳定版**的 MongoDB
```
sudo apt install -y mongodb-org
```
或者某个**特定版本**(在**等号**后面修改版本号)
```
sudo apt install -y mongodb-org=4.0.6 mongodb-org-server=4.0.6 mongodb-org-shell=4.0.6 mongodb-org-mongos=4.0.6 mongodb-org-tools=4.0.6
```
如果你选择安装特定版本,请确保在所有位置都修改了版本号。如果你修改了 **mongodb-org=4.0.6**,你将安装最新版本。
默认情况下,使用包管理器(**apt-get**更新时MongoDB 将更新为最新的版本。要阻止这种情况发生(并冻结为已安装的版本),请使用:
```
echo "mongodb-org hold" | sudo dpkg --set-selections
echo "mongodb-org-server hold" | sudo dpkg --set-selections
echo "mongodb-org-shell hold" | sudo dpkg --set-selections
echo "mongodb-org-mongos hold" | sudo dpkg --set-selections
echo "mongodb-org-tools hold" | sudo dpkg --set-selections
```
你现在已经成功安装了 MongoDB
##### 配置 MongoDB
默认情况下,包管理器将创建 **/var/lib/mongodb** 和 **/var/log/mongodb**MongoDB 将使用 **mongodb** 用户帐户运行。
我不会去更改这些默认设置,因为这超出了本指南的范围。有关详细信息,请查看[手册][5]。
**/etc/mongod.conf** 中的设置在启动/重新启动 **mongodb** 服务实例时生效。
##### 运行 MongoDB
要启动 mongodb 的守护进程 **mongod**,请输入:
```
sudo service mongod start
```
现在你应该验证 **mongod** 进程是否已成功启动。此信息(默认情况下)保存在 **/var/log/mongodb/mongod.log** 中。我们来看看文件的内容:
```
sudo cat /var/log/mongodb/mongod.log
```
![Check MongoDB logs to see if the process is running properly.][6]
只要你在某处看到:**[initandlisten] waiting for connections on port 27017**,就说明进程正常运行。
**注意27017** 是 **mongod** 的默认端口。
要停止/重启 **mongod**,请输入:
```
sudo service mongod stop
sudo service mongod restart
```
现在,你可以通过打开 **mongo shell** 来使用 MongoDB
```
mongo
```
##### 卸载 MongoDB
运行以下命令
```
sudo service mongod stop
sudo apt purge mongodb-org*
```
要删除**数据库**和**日志文件**(确保**备份**你要保留的内容!):
```
sudo rm -r /var/log/mongodb
sudo rm -r /var/lib/mongodb
```
**总结**
MongoDB 是一个很棒的 NoSQL 数据库,它易于集成到现代项目中。我希望本教程能帮助你在 Ubuntu 上安装它!在下面的评论中告诉我们你计划如何使用 MongoDB。
--------------------------------------------------------------------------------
via: https://itsfoss.com/install-mongodb-ubuntu
作者:[Sergiu][a]
选题:[lujun9972][b]
译者:[geekpi](https://github.com/geekpi)
校对:[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译,[Linux中国](https://linux.cn/) 荣誉推出
[a]: https://itsfoss.com/author/sergiu/
[b]: https://github.com/lujun9972
[1]: https://www.mongodb.com/
[2]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/03/mongodb-ubuntu.jpeg?resize=800%2C450&ssl=1
[3]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/02/mongodb_check_status.jpg?fit=800%2C574&ssl=1
[4]: https://docs.mongodb.com/manual/tutorial/getting-started/
[5]: https://docs.mongodb.com/manual/
[6]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/02/mongodb_org_check_logs.jpg?fit=800%2C467&ssl=1