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en/12.5.md

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-# 12.5 小结
-本章讨论了如何部署和维护我们开发的Web应用相关的一些话题。这些内容非常重要，要创建一个能够基于最小维护平滑运行的应用，必须考虑这些问题。
-
-具体而言，本章讨论的内容包括：
-
-- 创建一个强健的日志系统，可以在出现问题时记录错误并且通知系统管理员
-- 处理运行时可能出现的错误，包括记录日志，并如何友好的显示给用户系统出现了问题
-- 处理404错误，告诉用户请求的页面找不到
-- 将应用部署到一个生产环境中(包括如何部署更新)
-- 如何让部署的应用程序具有高可用
-- 备份和恢复文件以及数据库
-
-读完本章内容后，对于从头开始开发一个Web应用需要考虑那些问题，你应该已经有了全面的了解。本章内容将有助于你在实际环境中管理前面各章介绍开发的代码。
-
-## links
-   * [目录](<preface.md>)
-   * 上一章: [备份和恢复](<12.4.md>)
-   * 下一节: [如何设计一个Web框架](<13.0.md>)
+# 12.5 Summary
+
+This chapter discusses how to deploy and maintain Web applications we develop some related topics. The content is very important to be able to create a minimum maintenance based applications running smoothly, we must consider these issues.
+
+Specifically, the discussion in this chapter include:
+
+- Create a robust logging system that can record an error in case of problems and notify the system administrator
+- Handle runtime errors that may occur, including logging, and how to display to the user-friendly system there is a problem
+- Handling 404 errors, telling the user can not find the requested page
+- Deploy applications to a production environment (including how to deploy updates)
+- How to deploy highly available applications
+- Backup and restore files and databases
+
+After reading this chapter, for the development of a Web application from scratch, those issues need to be considered, you should already have a comprehensive understanding. This chapter will help you in the actual environment management in the preceding chapter describes the development of the code.
+
+## Links
+
+- [Directory](preface.md)
+- Previous section: [Backup and recovery](12.4.md)
+- Next chapter: [Build a web framework](13.0.md)