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Working with modules in Fedora 28
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======
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The recent Fedora Magazine article entitled [Modularity in Fedora 28 Server Edition][1] did a great job of explaining Modularity in Fedora 28. It also pointed out a few example modules and explained the problems they solve. This article puts one of those modules to practical use, covering installation and setup of Review Board 3.0 using modules.
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### Getting started
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To follow along with this article and use modules, you need a system running [Fedora 28 Server Edition][2] along with [sudo administrative privileges][3]. Also, run this command to make sure all the packages on the system are current:
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```
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sudo dnf -y update
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```
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While you can use modules on Fedora 28 non-server editions, be aware of the [caveats described in the comments of the previous article][4].
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### Examining modules
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First, take a look at what modules are available for Fedora 28. Run the following command:
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```
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dnf module list
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```
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The output lists a collection of modules that shows the associated stream, version, and available installation profiles for each. A [d] next to a particular module stream indicates the default stream used if the named module is installed.
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The output also shows most modules have a profile named default. That’s not a coincidence, since default is the name used for the default profile.
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To see where all those modules are coming from, run:
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```
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dnf repolist
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```
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Along with the usual [fedora and updates package repositories][5], the output shows the fedora-modular and updates-modular repositories.
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The introduction stated you’d be setting up Review Board 3.0. Perhaps a module named reviewboard caught your attention in the earlier output. Next, to get some details about that module, run this command:
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```
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dnf module info reviewboard
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```
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The description confirms it is the Review Board module, but also says it’s the 2.5 stream. However, you want 3.0. Look at the available reviewboard modules:
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```
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dnf module list reviewboard
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```
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The [d] next to the 2.5 stream means it is configured as the default stream for reviewboard. Therefore, be explicit about the stream you want:
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```
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dnf module info reviewboard:3.0
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```
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Now for even more details about the reviewboard:3.0 module, add the verbose option:
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```
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dnf module info reviewboard:3.0 -v
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```
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### Installing the Review Board 3.0 module
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Now that you’ve tracked down the module you want, install it with this command:
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```
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sudo dnf -y module install reviewboard:3.0
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```
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The output shows the ReviewBoard package was installed, along with several other dependent packages, including several from the django:1.6 module. The installation also enabled the reviewboard:3.0 module and the dependent django:1.6 module.
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Next, to see enabled modules, use this command:
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```
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dnf module list --enabled
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```
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The output shows [e] for enabled streams, and [i] for installed profiles. In the case of the reviewboard:3.0 module, the default profile was installed. You could have specified a different profile when installing the module. In fact, you still can — and this time you don’t need to specify the 3.0 stream since it was already enabled:
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```
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sudo dnf -y module install reviewboard/server
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```
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However, installation of the reviewboard:3.0/server profile is rather uneventful. The reviewboard:3.0 module’s server profile is the same as the default profile — so there’s nothing more to install.
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### Spin up a Review Board site
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Now that the Review Board 3.0 module and its dependent packages are installed, [create a Review Board site][6] running on the local system. Without further ado or explanation, copy and paste the following commands to do that:
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```
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sudo rb-site install --noinput \
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--domain-name=localhost --db-type=sqlite3 \
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--db-name=/var/www/rev.local/data/reviewboard.db \
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--admin-user=rbadmin --admin-password=secret \
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/var/www/rev.local
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sudo chown -R apache /var/www/rev.local/htdocs/media/uploaded \
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/var/www/rev.local/data
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sudo ln -s /var/www/rev.local/conf/apache-wsgi.conf \
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/etc/httpd/conf.d/reviewboard-localhost.conf
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sudo setsebool -P httpd_can_sendmail=1 httpd_can_network_connect=1 \
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httpd_can_network_memcache=1 httpd_unified=1
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sudo systemctl enable --now httpd
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```
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Now fire up a web browser on the system, point it at <http://localhost>, and enjoy the shiny new Review Board site! To login as the Review Board admin, use the userid and password seen in the rb-site command above.
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### Module cleanup
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It’s good practice to clean up after yourself. To do that, remove the Review Board module and the site directory:
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```
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sudo dnf -y module remove reviewboard:3.0
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sudo rm -rf /var/www/rev.local
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```
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### Closing remarks
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Now that you’ve explored how to examine and administer the Review Board module, go experiment with the other modules available in Fedora 28.
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Learn more about using modules in Fedora 28 on the [Fedora Modularity][7] web site. The dnf manual page’s Module Command section also contains useful information.
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--------------------------------------------------------------------------------
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via: https://fedoramagazine.org/working-modules-fedora-28/
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作者：[Merlin Mathesius][a]
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选题：[lujun9972](https://github.com/lujun9972)
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:https://fedoramagazine.org/author/merlinm/
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[1]:https://fedoramagazine.org/modularity-fedora-28-server-edition/
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[2]:https://getfedora.org/server/
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[3]:https://fedoramagazine.org/howto-use-sudo/
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[4]:https://fedoramagazine.org/modularity-fedora-28-server-edition/#comment-476696
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[5]:https://fedoraproject.org/wiki/Repositories
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[6]:https://www.reviewboard.org/docs/manual/dev/admin/installation/creating-sites/
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[7]:https://docs.pagure.org/modularity/
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134
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使用 Fedora 28 中的模块
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======
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最近 Fedora Magazine 中题为 [Fedora 28 服务器版的模块化][1]在解释 Fedora 28 中的模块化方面做得很好。它还给出了一些示例模块并解释了它们解决的问题。本文将其中一个模块用于实际应用，包括使用模块安装设置 Review Board 3.0。
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### 入门
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想要继续并使用模块，你需要一个 [Fedora 28 服务器版][2]并拥有 [sudo 管理权限][3]。另外，运行此命令以确保系统上的所有软件包都是最新的：
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```
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sudo dnf -y update
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```
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虽然你可以在 Fedora 28 非服务器版本上使用模块，但请注意[上一篇文章评论中提到的警告][4]。
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### 检查模块
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首先，看看 Fedora 28 可用的模块。运行以下命令：
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```
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dnf module list
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```
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输出列出了一组模块，这些模块显示了每个模块的关联流，版本和可用安装配置文件。模块流旁边的 [d] 表示安装命名模块时使用的默认流。
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输出还显示大多数模块都有名为 default 的配置文件。这不是巧合，因为 default 是默认配置文件使用的名称。
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要查看所有这些模块的来源，请运行：
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```
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dnf repolist
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```
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与通常的 [fedora 和更新包仓库][5]一起，输出还显示了fedora-modular 和 updates-modular 仓库。
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介绍声明你将设置 Review Board 3.0。也许名为 reviewboard 的模块在之前的输出中引起了你的注意。接下来，要获取有关该模块的一些详细信息，请运行以下命令：
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```
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dnf module info reviewboard
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```
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根据描述确认它是 Review Board 模块，但也说明是 2.5 的流。然而你想要 3.0 的。查看可用的 reviewboard 模块：
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```
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dnf module list reviewboard
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```
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2.5 旁边的 [d] 表示它被配置为 reviewboard 的默认流。因此，请明确你想要的流：
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```
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dnf module info reviewboard:3.0
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```
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有关 reviewboard:3.0 模块的更多详细信息，请添加详细选项：
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```
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dnf module info reviewboard:3.0 -v
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```
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### 安装 Review Board 3.0 模块
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现在你已经跟踪了所需的模块，请使用以下命令安装它：
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```
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sudo dnf -y module install reviewboard:3.0
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```
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输出显示已安装 ReviewBoard 以及其他几个依赖软件包，其中包括 django:1.6 模块中的几个软件包。安装还启用了reviewboard:3.0 模块和相关的 django:1.6 模块。
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接下来，要查看已启用的模块，请使用以下命令：
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```
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dnf module list --enabled
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```
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输出中，[e] 表示已启用的流，[i] 表示已安装的配置。对于 reviewboard:3.0 模块，已安装默认配置。你可以在安装模块时指定其他配置。实际上，你仍然可以安装它，而且这次你不需要指定 3.0，因为它已经启用：
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```
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sudo dnf -y module install reviewboard/server
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```
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但是，安装 reviewboard:3.0/服务配置非常平常。reviewboard:3.0 模块的服务器配置与默认配置文件相同 - 因此无需安装。
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### 启动 Review Board 网站
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现在已经安装了 Review Board 3.0 模块及其相关软件包，[创建一个本地运行的 Review Board 网站][6]。无需解释，请复制并粘贴以下命令：
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```
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sudo rb-site install --noinput \
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--domain-name=localhost --db-type=sqlite3 \
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--db-name=/var/www/rev.local/data/reviewboard.db \
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--admin-user=rbadmin --admin-password=secret \
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/var/www/rev.local
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sudo chown -R apache /var/www/rev.local/htdocs/media/uploaded \
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/var/www/rev.local/data
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sudo ln -s /var/www/rev.local/conf/apache-wsgi.conf \
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/etc/httpd/conf.d/reviewboard-localhost.conf
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sudo setsebool -P httpd_can_sendmail=1 httpd_can_network_connect=1 \
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httpd_can_network_memcache=1 httpd_unified=1
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sudo systemctl enable --now httpd
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```
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现在启动系统中的 Web 浏览器，打开 <http://localhost>，然后享受全新的 Review Board 网站！要以 Review Board 管理员身份登录，请使用上面 rb-site 命令中的用户 ID 和密码。
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### 模块清理
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完成后清理是个好习惯。为此，删除 Review Board 模块和站点目录：
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```
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sudo dnf -y module remove reviewboard:3.0
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sudo rm -rf /var/www/rev.local
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```
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### 总结
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现在你已经探索了如何检测和管理 Review Board 模块，那么去体验 Fedora 28 中提供的其他模块吧。
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在 [Fedora 模块化][7]网站上了解有关在 Fedora 28 中使用模块的更多信息。dnf 手册页中的 module 命令部分也包含了有用的信息。
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--------------------------------------------------------------------------------
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via: https://fedoramagazine.org/working-modules-fedora-28/
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作者：[Merlin Mathesius][a]
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选题：[lujun9972](https://github.com/lujun9972)
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译者：[geekpi](https://github.com/geekpi)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:https://fedoramagazine.org/author/merlinm/
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[1]:https://fedoramagazine.org/modularity-fedora-28-server-edition/
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[2]:https://getfedora.org/server/
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[3]:https://fedoramagazine.org/howto-use-sudo/
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[4]:https://fedoramagazine.org/modularity-fedora-28-server-edition/#comment-476696
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[5]:https://fedoraproject.org/wiki/Repositories
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[6]:https://www.reviewboard.org/docs/manual/dev/admin/installation/creating-sites/
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[7]:https://docs.pagure.org/modularity/
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