Linux kernel 的官方 GIT地址是：
可以从这个地址拿到 kernel 的 代码仓库。
1. 拿代码仓库
git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
2. 查看状态：
$ git status
# On branch master
nothing to commit (working directory clean)
3. 更新本地的代码：
$ git pull
Already up-to-date.
4. 切换到分支：
$ git checkout linux-3.10.y
Checking out files: 100% (25952/25952), done.
Switched to branch 'linux-3.10.y' 5. 查看分支信息：
$ git branch
* linux-3.10.y
master
$ git branch -a
* linux-3.10.y
master
remotes/origin/HEAD -> origin/master
remotes/origin/linux-2.6.11.y
remotes/origin/linux-2.6.12.y
remotes/origin/linux-2.6.13.y
remotes/origin/linux-2.6.14.y
remotes/origin/linux-2.6.15.y
remotes/origin/linux-2.6.16.y
remotes/origin/linux-2.6.17.y
remotes/origin/linux-2.6.18.y
remotes/origin/linux-2.6.19.y
remotes/origin/linux-2.6.20.y
remotes/origin/linux-2.6.21.y
remotes/origin/linux-2.6.22.y
remotes/origin/linux-2.6.23.y
remotes/origin/linux-2.6.24.y
remotes/origin/linux-2.6.25.y
remotes/origin/linux-2.6.26.y
remotes/origin/linux-2.6.27.y
remotes/origin/linux-2.6.28.y
remotes/origin/linux-2.6.29.y
remotes/origin/linux-2.6.30.y
remotes/origin/linux-2.6.31.y
remotes/origin/linux-2.6.32.y
remotes/origin/linux-2.6.33.y
remotes/origin/linux-2.6.34.y
remotes/origin/linux-2.6.35.y
remotes/origin/linux-2.6.36.y
remotes/origin/linux-2.6.37.y
remotes/origin/linux-2.6.38.y
remotes/origin/linux-2.6.39.y
remotes/origin/linux-3.0.y
remotes/origin/linux-3.1.y
remotes/origin/linux-3.10.y
remotes/origin/linux-3.11.y
remotes/origin/linux-3.12.y
remotes/origin/linux-3.13.y
remotes/origin/linux-3.14.y
remotes/origin/linux-3.2.y
remotes/origin/linux-3.3.y
remotes/origin/linux-3.4.y
remotes/origin/linux-3.5.y
remotes/origin/linux-3.6.y
remotes/origin/linux-3.7.y
remotes/origin/linux-3.8.y
remotes/origin/linux-3.9.y
remotes/origin/master
6. 创建一个新分支：
$ git checkout -b linux-3.10-charles
Switched to a new branch 'linux-3.10-charles'
$ git branch
* linux-3.10-charles
linux-3.10.y
master 7. 修改文件 init/main.c, 加入一行注释，然后 执行
$ git status
# On branch linux-3.10-charles
# Changes to be committed:
# (use "git reset HEAD ..." to unstage)
#
# modified: init/main.c
#
e$ git add -i
staged unstaged path
1: +2/-0 nothing init/main.c
*** Commands ***
1: [s]tatus 2: [u]pdate 3: [r]evert 4: [a]dd untracked
5: [p]atch 6: [d]iff 7: [q]uit 8: [h]elp
What now>
如果选择 revert 命令，相当于 undo "git add .":
What now>r
staged unstaged path
1: +2/-0 nothing [i]nit/main.c
Revert>>
reverted one path
*** Commands ***
1: [s]tatus 2: [u]pdate 3: [r]evert 4: [a]dd untracked
5: [p]atch 6: [d]iff 7: [q]uit 8: [h]elp
What now>q 这个时候再执行 git status:
$ git status
# On branch linux-3.10-charles
# Changes not staged for commit:
# (use "git add ..." to update what will be committed)
# (use "git checkout -- ..." to discard changes in working directory)
#
# modified: init/main.c
#
no changes added to commit (use "git add" and/or "git commit -a")
8. 提交修改：
$ git commit -a -m "This is just for testing git"
[linux-3.10-charles 9eabb78] This is just for testing git
1 file changed, 1 insertion(+), 1 deletion(-) 9. 查看修改记录(git log)：
commit 9eabb788b5c33efed589b1263aedd69b97e592ac
Author: Taotao Ding
Date: Wed May 7 03:36:55 2014 +0900
This is just for testing git
commit 5d897eedc505bb8af1f4865ae381eadbfd3bc8c1
Author: Greg Kroah-Hartman
Date: Tue May 6 07:56:24 2014 -0700
Linux 3.10.39
commit 6b32172a1d3cffa74067ced96612bd13658d4fcf
Author: Felipe Balbi
Date: Tue Feb 25 10:58:43 2014 -0600
usb: musb: avoid NULL pointer dereference 可以看到，修改已经被记录起来了。
git log -p
commit 9eabb788b5c33efed589b1263aedd69b97e592ac
Author: Taotao Ding
Date: Wed May 7 03:36:55 2014 +0900
This is just for testing git
diff --git a/init/main.c b/init/main.c
index e83ac04..febc1e9 100644
--- a/init/main.c
+++ b/init/main.c
@@ -10,7 +10,7 @@
*/
#define DEBUG /* Enable initcall_debug */
-
+/* This is a test line for git */
#include
#include
#include
10： 查看一个文件最近的修改记录：
$ git log master..HEAD init/main.c
commit 9eabb788b5c33efed589b1263aedd69b97e592ac
Author: Taotao Ding
Date: Wed May 7 03:36:55 2014 +0900
This is just for testing git
commit b7a52f5111bc53ffbfff96330621cbde80df6ba4
Author: Theodore Ts'o
Date: Tue Sep 10 10:52:35 2013 -0400
random: run random_int_secret_init() run after all late_initcalls
commit 47d06e532e95b71c0db3839ebdef3fe8812fca2c upstream.
The some platforms (e.g., ARM) initializes their clocks as
late_initcalls for some unknown reason. So make sure
random_int_secret_init() is run after all of the late_initcalls are
run.
Signed-off-by: "Theodore Ts'o"
Signed-off-by: Greg Kroah-Hartman
11： 比较两个分支的差异：
$ git log linux-3.10.y..linux-3.10-charles
commit 9eabb788b5c33efed589b1263aedd69b97e592ac
Author: Taotao Ding
Date: Wed May 7 03:36:55 2014 +0900
This is just for testing git
当前分支也可写成 HEAD，所以：
$ git log linux-3.10.y..HEAD
commit 9eabb788b5c33efed589b1263aedd69b97e592ac
Author: Taotao Ding
Date: Wed May 7 03:36:55 2014 +0900
This is just for testing git
reference:
P.S.
配置 username 和 user.email 的方法：
git config user.email "username"
git config user.email "email@server"
这两个命令改变 .git/config 配置文件 (local)
git config --global user.email "username"
git config --global user.email "email@server"
git config --global core.editor "vim" 则改变全局的 git 配置文件 (～/.gitconfig)