fix

_sidebar.md

@@ -16,6 +16,7 @@
   - [Visual Basic](doc/visual-basic.md)
   - [C 语言](doc/c.md)
   - [Ruby](doc/ruby.md)
+  - [Linux](doc/linux.md)
 
 - 数据库
 

doc/c.md

 # C 语言
+
+[慕课网-C语言入门](http://www.imooc.com/learn/249)
\ No newline at end of file

doc/linux.md

+# Linux
+
+[The Linux Kernel Archives](https://www.kernel.org/)
\ No newline at end of file

doc/php.md

@@ -40,3 +40,5 @@
 [catchadmin](https://www.catchadmin.com/): 基于 Thinkphp & Vue 开发的后台管理框架
 
 [Swoole](https://wiki.swoole.com/)：使用 C++ 语言编写的基于异步事件驱动和协程的并行网络通信引擎，为 PHP 提供协程、高性能网络编程支持
+
+[Twig](https://twig.symfony.com/):  is a modern template engine for PHP
\ No newline at end of file

doc/python.md

@@ -64,6 +64,12 @@ Celery
 
 [jinja](https://jinja.palletsprojects.com/): a fast, expressive, extensible templating engine
 
+[JPype](https://jpype.readthedocs.io/en/latest/index.html):  a Python module to provide full access to Java from within Python.
+
+[Django REST framework](https://www.django-rest-framework.org/):  a powerful and flexible toolkit for building Web APIs.
+
+[SQLAlchemy](https://www.sqlalchemy.org/):the Python SQL toolkit and Object Relational Mapper that gives application developers the full power and flexibility of SQL.
+
 ## 爬虫
 
 [云立方](https://www.yunlifang.cn/): 动态 VPS