diff --git a/docs/README.md b/docs/README.md
index 8a54a0a..53bcacd 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -1,3 +1,13 @@
-# linux-notes
+# linux
 
-:book: Linux 学习笔记。
+<p align="center">
+  :penguin: 后端程序员的 linux/shell 工具箱、经验总结。
+</p>
+
+<p align="center">
+  <img src="http://oyz7npk35.bkt.clouddn.com//image/linux/linux.jpg" alt="linux" width="640">
+</p>
+
+<p align="center">
+  <a href="https://dunwu.gitbooks.io/linux/" target="_blank">:point_right: 电子书</a>
+</p>
diff --git a/docs/SUMMARY.md b/docs/SUMMARY.md
index 66f8c29..77a8f92 100644
--- a/docs/SUMMARY.md
+++ b/docs/SUMMARY.md
@@ -1,24 +1,23 @@
 # Summary
 
+## 教程
+
 * [简介](README.md)
-
-## Linux
-
-* [Linux 常用命令](linux/commands/README.md)
+* [Linux](linux/README.md)
+  * [Linux 常用命令](linux/commands/README.md)
   * [Linux 常用命令-系统设置](linux/commands/linux-cmd-system.md)
   * [Linux 常用命令-文件目录](linux/commands/linux-cmd-file-and-folder.md)
   * [Linux 常用命令-磁盘管理](linux/commands/linux-cmd-disk.md)
   * [Linux 常用命令-网络管理](linux/commands/linux-cmd-network.md)
   * [Linux 常用命令-压缩](linux/commands/linux-cmd-compress.md)
-
-## Shell
-
-* [Shell 快速指南](shell/shell.md)
-
-## Vim
-
-* [Vim 学习笔记](vim/vim.md)
-* [Vim 快捷键图](vim/vim-keyboards.md)
+* [Shell](shell/README.md)
+  * [Shell 快速指南](shell/shell-quickstart.md)
+* [Vim](vim/README.md)
+  * [Vim 学习笔记](vim/vim.md)
+  * [Vim 快捷键图](vim/vim-keyboards.md)
+* [Git](git/README.md)
+  * [git 快速指南](git/git-quickstart.md)
+  * [git-flow 工作流](git/git-flow.md)
 
 ## 附录
 
diff --git a/docs/git/README.md b/docs/git/README.md
new file mode 100644
index 0000000..8d36a8e
--- /dev/null
+++ b/docs/git/README.md
@@ -0,0 +1 @@
+# git
diff --git a/docs/git/git.md b/docs/git/git-quickstart.md
similarity index 100%
rename from docs/git/git.md
rename to docs/git/git-quickstart.md
diff --git a/docs/linux/README.md b/docs/linux/README.md
new file mode 100644
index 0000000..bd7670d
--- /dev/null
+++ b/docs/linux/README.md
@@ -0,0 +1 @@
+# linux
diff --git a/docs/shell/README.md b/docs/shell/README.md
new file mode 100644
index 0000000..8d9cea8
--- /dev/null
+++ b/docs/shell/README.md
@@ -0,0 +1,5 @@
+# shell
+
+Shell 是一个用 C 语言编写的程序，它是用户使用 Linux 的桥梁。Shell 既是一种命令语言，又是一种程序设计语言。
+
+Shell 是指一种应用程序，这个应用程序提供了一个界面，用户通过这个界面访问操作系统内核的服务。
diff --git a/docs/shell/shell.md b/docs/shell/shell-quickstart.md
similarity index 100%
rename from docs/shell/shell.md
rename to docs/shell/shell-quickstart.md
diff --git a/docs/vim/README.md b/docs/vim/README.md
new file mode 100644
index 0000000..aa7e860
--- /dev/null
+++ b/docs/vim/README.md
@@ -0,0 +1 @@
+# vim