編寫軟件，時常免不了修修改改，修改過後的代碼不一定比前面好，甚至產生新問題，或者有時無意間修改了某行代碼，導致出錯，這種情況都是很常見的，如果此時沒有版本管理，如果是小軟件可能沒什麽影響，如果代碼量很大，就是個很頭疼的問題，git的出現正是為了解決這個問題的，對於碼農來說，簡直是神器，下面簡單記錄下。

基本操作：
1.倉庫初始化：
直接進入文件夾，輸入git init
2.添加文件：
一個文件(比如x文件)：git add x
多個文件(比如x，y文件)：git add x y
整個文件夾文件：git add *
3.提交文件：
一行註釋：git commit -m "you comment"
多行註釋：git commit -m ",然後按下回車，輸入內容，然後繼續輸入內容，輸入完之後輸入"

[email protected]:tst$ git init        # 初始化
Initialized empty Git repository 
 
in /samba/TMP/tst/.git/
[email protected]:tst$ vi tst.txt
[email protected]:tst$ git status    # 查看狀態
On branch master

Initial commit

Untracked files:
  (use "git add <file>..." to include in what will be committed)

        tst.txt

nothing added to commit but untracked files present (use 
 
"git add" to track)
[email protected]:tst$ git add tst.txt    # 添加文件
[email protected]:tst$ git commit -m "    # 提交文件
> first commit
> "
[master (root-commit) 767ba26] first commit
 1 file changed, 1 insertion(+)
 create mode 100644 tst.txt
[email protected]:tst$ git log            # 查看日誌
commit 767ba26cc39de73ab2848680058a339341599fe8
Author: Your Name <[email protected]>
Date:   Thu Aug 24 22:11:56 2017 +0800

    first commit
[email protected]:tst$ vi tst.txt
[email protected]:tst$ git diff            # 查看修改
diff --git a/tst.txt b/tst.txt
index d00491f..48082f7 100644
--- a/tst.txt
+++ b/tst.txt
@@ -1 +1 @@
-1
+12
[email protected]:tst$ git status        # 再次查看狀態
On branch master
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

        modified:   tst.txt

no changes added to commit (use "git add" and/or "git commit -a")
[email protected]:tst$ git add tst.txt    # 再次添加修改後的文件
[email protected]:tst$ git commit -m "second commit" # 提交修改
[master be932f8] second commit
 1 file changed, 1 insertion(+), 1 deletion(-)
[email protected]:tst$ git log            # 查看日誌
commit be932f8fee8cfa266e0c2051905ff428d2f8bdb5
Author: Your Name <[email protected]>
Date:   Thu Aug 24 22:16:21 2017 +0800

    second commit

commit 767ba26cc39de73ab2848680058a339341599fe8
Author: Your Name <[email protected]>
Date:   Thu Aug 24 22:11:56 2017 +0800

    first commit
[email protected]:tst$ git reflog        # 查看所有操作日誌
be932f8 [email protected]{0}: commit: second commit
767ba26 [email protected]{1}: commit (initial): first commit
[email protected]:tst$ git reset --hard 767ba26 # 回滾到第一次提交
HEAD is now at 767ba26 first commit
[email protected]:tst$ git log                    # 查看日誌    
commit 767ba26cc39de73ab2848680058a339341599fe8
Author: Your Name <[email protected]>
Date:   Thu Aug 24 22:11:56 2017 +0800

    first commit
[email protected]:tst$ git reflog        # 查看所有操作日誌
767ba26 [email protected]{0}: reset: moving to 767ba26
be932f8 [email protected]{1}: commit: second commit
767ba26 [email protected]{2}: commit (initial): first commit
[email protected]:tst$ git reset --hard be932f8    # 回滾到第二次提交
HEAD is now at be932f8 second commit
[email protected]:tst$ git log
commit be932f8fee8cfa266e0c2051905ff428d2f8bdb5
Author: Your Name <[email protected]>
Date:   Thu Aug 24 22:16:21 2017 +0800

    second commit

commit 767ba26cc39de73ab2848680058a339341599fe8
Author: Your Name <[email protected]>
Date:   Thu Aug 24 22:11:56 2017 +0800

    first commit
[email protected]:tst$

git使用<一>：本地倉庫的常用操作