看了廖雪峰老师的git教程，自己总结一下实际会用到的问题。
基础环境：
server：centos 6.8
client ：A：mac B：linux
一、安装git，搭建git服务器
1、yum install git 此步骤省略。
2、服务器ip地址192.168.100.136
二、添加git账户，用来启动git服务器。
1、useradd -d /home/git -m git 添加git用户及家目录
2、设置git账户密码 passwd git
2、初始化git仓库。这里选择/home/git/repository.git
三、禁用git用户shell登陆（可选）
1、修改／etc/passwd中的git账户登录信息
2、添加客户端的ssh公钥到服务器的authorized_keys中。
客户机和服务器都执行ssh-keygen，默认一直回车，公钥就是.ssh/目录下的id_rsa.pub,将客户机id_rsa.pub里的内容复制到服务器的authorized_keys文件中，如下图。
服务器在/root/.ssh/目录下新建authorized_keys，用于存储需要认证的客户端公钥。
四、客户端克隆git仓库。
1、登录客户机(A)，默认在/document/目录下克隆仓库。
git clone git@192.168.100.136:/home/git/repository.git/
五、git命令操作
首先进入克隆后到仓库目录，配置需要提交到git仓库的用户和邮箱信息，用于日后的开发问题排查。
chenhuachaodeMacBook-Pro:repository chenhuachao$ git config --global user.name chenhuachao chenhuachaodeMacBook-Pro:repository chenhuachao$ git config --global user.email chenhuachao@163.com
新建一个文件，并且加入内容，提交仓库，并查看状态，日志信息
chenhuachaodeMacBook-Pro:repository chenhuachao$ echo "add test file " >test.txt chenhuachaodeMacBook-Pro:repository chenhuachao$ git add test.txt chenhuachaodeMacBook-Pro:repository chenhuachao$ git commit -m "add test file" [master (root-commit) 6ff7cc8] add test file 1 file changed, 1 insertion(+) create mode 100644 test.txt chenhuachaodeMacBook-Pro:repository chenhuachao$ git status On branch master Your branch is based on 'origin/master', but the upstream is gone. (use "git branch --unset-upstream" to fixup) nothing to commit, working tree clean chenhuachaodeMacBook-Pro:repository chenhuachao$ git log commit 6ff7cc88f64e3b4e80543354f5b611d4b5782014 Author: chenhuachao <chenhuachao@163.com> Date: Tue Feb 14 13:58:10 2017 +0800 add test file chenhuachaodeMacBook-Pro:repository chenhuachao$
git add命令只是把文件提交到暂存区，git commit才会把暂存区的内容推送到git本地仓库，如果想要提交到远程仓库，那么就要使用git push origin命令
chenhuachaodeMacBook-Pro:repository chenhuachao$ git push origin git@192.168.100.136's password: Counting objects: 3, done. Writing objects: 100% (3/3), 221 bytes | 0 bytes/s, done. Total 3 (delta 0), reused 0 (delta 0) To 192.168.100.136:/home/git/repository.git * [new branch] master -> master
删除仓库文件：
[root@chenhuachao repository]# git rm dev.txt rm 'dev.txt' [root@chenhuachao repository]# git commit -m "del dev" [dev 772c462] del dev 1 files changed, 0 insertions(+), 3 deletions(-) delete mode 100644 dev.txt [root@chenhuachao repository]# git push origin dev git@192.168.100.136's password: Counting objects: 12, done. Compressing objects: 100% (5/5), done. Writing objects: 100% (8/8), 769 bytes, done. Total 8 (delta 0), reused 0 (delta 0) To git@192.168.100.136:/home/git/repository.git/ 9ebf491..772c462 dev -> dev [root@chenhuachao repository]# ls test.txt
常见冲突问题：：
重新登录一台客户机(B)，重新克隆git仓库,可以看到推送到内容已经出现
[root@chenhuachao home]# git clone git@192.168.100.136:/home/git/repository.git/ Initialized empty Git repository in /home/repository/.git/ git@192.168.100.136's password: remote: Counting objects: 3, done. Receiving objects: 100% (3/3), 220 bytes, done. remote: Total 3 (delta 0), reused 0 (delta 0) [root@chenhuachao home]# ls chenhuachao git python_script repository [root@chenhuachao home]# cd repository/ [root@chenhuachao repository]# ls test.txt [root@chenhuachao repository]# cat test.txt add test file [root@chenhuachao repository]#
如果这个时候，在B机器上修改test.txt文件并且提交,推送到git远程仓库。
[root@chenhuachao repository]# git config --global user.name zhangsan [root@chenhuachao repository]# git config --global user.email zhangsan@163.com [root@chenhuachao repository]# cat test.txt add test file modify test file B [root@chenhuachao repository]# git add test.txt [root@chenhuachao repository]# git commit -m "modify test wiht B" [master bcd8cc4] modify test wiht B 1 files changed, 1 insertions(+), 0 deletions(-) [root@chenhuachao repository]# git log commit bcd8cc4245748a93f6636780f4ea46dde2193497 Author: zhangsan <zhangsan@163.com> Date: Tue Feb 14 14:12:50 2017 +0800 modify test wiht B commit 6ff7cc88f64e3b4e80543354f5b611d4b5782014 Author: chenhuachao <chenhuachao@163.com> Date: Tue Feb 14 13:58:10 2017 +0800 add test file [root@chenhuachao repository]# git push origin
然后在A机器上同时也修改test.txt文件，提交并推送到git远程仓库。
chenhuachaodeMacBook-Pro:repository chenhuachao$ vim test.txt chenhuachaodeMacBook-Pro:repository chenhuachao$ cat test.txt add test file modiry test wiht A chenhuachaodeMacBook-Pro:repository chenhuachao$ git add test.txt chenhuachaodeMacBook-Pro:repository chenhuachao$ git commit -m "modify test with A" [master aa68ea5] modify test with A 1 file changed, 1 insertion(+) chenhuachaodeMacBook-Pro:repository chenhuachao$ git push origin 推送时提示需要更新仓库使用命令git pull，才能推送。 git@192.168.100.136's password: To 192.168.100.136:/home/git/repository.git ! [rejected] master -> master (fetch first) error: failed to push some refs to 'git@192.168.100.136:/home/git/repository.git' hint: Updates were rejected because the remote contains work that you do hint: not have locally. This is usually caused by another repository pushing hint: to the same ref. You may want to first integrate the remote changes hint: (e.g., 'git pull ...') before pushing again. hint: See the 'Note about fast-forwards' in 'git push --help' for details.
现在在A上用git pull更新仓库
chenhuachaodeMacBook-Pro:repository chenhuachao$ git pull git@192.168.100.136's password: remote: Counting objects: 5, done. remote: Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. From 192.168.100.136:/home/git/repository 6ff7cc8..bcd8cc4 master -> origin/master Auto-merging test.txt CONFLICT (content): Merge conflict in test.txt 提示有冲突，因为在A上提交的和在B上提交的是同一个文件，需要手工解决冲突 Automatic merge failed; fix conflicts and then commit the result
解决冲突
chenhuachaodeMacBook-Pro:repository chenhuachao$ cat test.txt add test file <<<<<<< HEAD #这是最后一次提交的 modiry test wiht A ======= #分隔符 modify test file B #这是上一次提交的 >>>>>>> bcd8cc4245748a93f6636780f4ea46dde2193497
更改文件内容为下面，然后重新提交，推送。就能解决冲突：
chenhuachaodeMacBook-Pro:repository chenhuachao$ cat test.txt add test file modiry test wiht A modify test file B chenhuachaodeMacBook-Pro:repository chenhuachao$ git add test.txt chenhuachaodeMacBook-Pro:repository chenhuachao$ git commit -m "modify test with A" [master 697f752] modify test with A chenhuachaodeMacBook-Pro:repository chenhuachao$ git push origin git@192.168.100.136's password: Counting objects: 6, done. Delta compression using up to 4 threads. Compressing objects: 100% (3/3), done. Writing objects: 100% (6/6), 545 bytes | 0 bytes/s, done. Total 6 (delta 0), reused 0 (delta 0) To 192.168.100.136:/home/git/repository.git bcd8cc4..697f752 master -> master
同时在B机器上执行git pull就能更新到最新文件
[root@chenhuachao repository]# git pull git@192.168.100.136's password: remote: Counting objects: 10, done. remote: Compressing objects: 100% (3/3), done. remote: Total 6 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (6/6), done. From 192.168.100.136:/home/git/repository bcd8cc4..697f752 master -> origin/master Updating bcd8cc4..697f752 Fast-forward test.txt | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) [root@chenhuachao repository]# cat test.txt add test file modiry test wiht A modify test file B
版本回退问题：
如果想要回退到下一个版本
[root@chenhuachao repository]# git log --pretty=oneline 697f7523546f62a07506cedc91d9bc69a78ae999 modify test with A aa68ea5d3c37acc891dcf55e378896ddc1ce21c3 modify test with A bcd8cc4245748a93f6636780f4ea46dde2193497 modify test wiht B 6ff7cc88f64e3b4e80543354f5b611d4b5782014 add test file 回退到上一个版本 [root@chenhuachao repository]# git reset --hard HEAD^ HEAD is now at aa68ea5 modify test with A [root@chenhuachao repository]# cat test.txt add test file modiry test wiht A
这里我们多提交几个版本，然后重新指定回退到某个版本
[root@chenhuachao repository]# git log --pretty=oneline 38be51f65e853a45109b05724e3b8cc46bc20a19 add 3 325d62bf97e4ef6d5bac2a4631b1587c25bc5c30 add 2 2db34db57dfa5aff79884034929963d3c9302f39 add 1 aa68ea5d3c37acc891dcf55e378896ddc1ce21c3 modify test with A 6ff7cc88f64e3b4e80543354f5b611d4b5782014 add test file [root@chenhuachao repository]# cat test.txt add test file modiry test wiht A add 1 add 2 add 3 这里我们回退到add 1的那个版本，只需要指定版本号的前7位即可 [root@chenhuachao repository]# git reset --hard 2db34db HEAD is now at 2db34db add 1 [root@chenhuachao repository]# cat test.txt add test file modiry test wiht A add 1
如果忘记历史提交的命令，可以通过git reflog命令查看
[root@chenhuachao repository]# git reflog
2db34db HEAD@{0}: 2db34db: updating HEAD
38be51f HEAD@{1}: commit: add 3
325d62b HEAD@{2}: commit: add 2
2db34db HEAD@{3}: commit: add 1
aa68ea5 HEAD@{4}: HEAD^: updating HEAD
697f752 HEAD@{5}: pull : Fast-forward
bcd8cc4 HEAD@{6}: commit: modify test wiht B
6ff7cc8 HEAD@{7}: clone: from git@192.168.100.136:/home/git/repository.git/分支问题：
利用命令git branch查看仓库分支
[root@chenhuachao repository]# git branch * master
实际开发当中，不会直接在git的master分支上直接操作
实际开发过程中：应有dev测试分支，平时只允许在dev分支进行开发，完全测试通过之后，才能合并到master分支。
master 分支用于发布正式版本
dev 分支用于开发环境和发布测试环境。
在B机器上新建分支dev,添加新文件，并提交dev分支到远程git仓库
[root@chenhuachao repository]# git checkout -b dev Switched to a new branch 'dev' [root@chenhuachao repository]# git branch * dev master [root@chenhuachao repository]# ls test.txt [root@chenhuachao repository]# vim dev.txt [root@chenhuachao repository]# git add dev.txt [root@chenhuachao repository]# git commit -m "add branch dev" [dev 820e19f] add branch dev 1 files changed, 1 insertions(+), 0 deletions(-) create mode 100644 dev.txt [root@chenhuachao repository]# git push origin dev git@192.168.100.136's password: Counting objects: 8, done. Compressing objects: 100% (3/3), done. Writing objects: 100% (6/6), 511 bytes, done. Total 6 (delta 0), reused 0 (delta 0) To git@192.168.100.136:/home/git/repository.git/ * [new branch] dev -> dev
现在登录A机器，重新更新仓库git pull
chenhuachaodeMacBook-Pro:repository chenhuachao$ git pull git@192.168.100.136's password: remote: Counting objects: 8, done. remote: Compressing objects: 100% (3/3), done. remote: Total 6 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (6/6), done. From 192.168.100.136:/home/git/repository * [new branch] dev -> origin/dev #能看到dev分支，但是默认更新上不会出现初master分支以外的其它分支 Already up-to-date. chenhuachaodeMacBook-Pro:repository chenhuachao$ git branch * master chenhuachaodeMacBook-Pro:repository chenhuachao$ ls test.txt 此时，如果想在A机器也有B机器提交的dev分支，就需要先在A机器创建dev分支，然后指定本地dev分支和远程仓库的dev分支地址，才能够更新远程dev分支。 chenhuachaodeMacBook-Pro:repository chenhuachao$ git branch dev chenhuachaodeMacBook-Pro:repository chenhuachao$ git branch dev * master 切换到dev分支 chenhuachaodeMacBook-Pro:repository chenhuachao$ git checkout dev Switched to branch 'dev' chenhuachaodeMacBook-Pro:repository chenhuachao$ ls test.txt chenhuachaodeMacBook-Pro:repository chenhuachao$ git pull git@192.168.100.136's password: There is no tracking information for the current branch. Please specify which branch you want to merge with. See git-pull(1) for details. git pull <remote> <branch> If you wish to set tracking information for this branch you can do so with: git branch --set-upstream-to=origin/<branch> dev 指定本地dev分支和远程dev分支地址链接。用于push推送 chenhuachaodeMacBook-Pro:repository chenhuachao$ git branch --set-upstream-to=origin/dev dev Branch dev set up to track remote branch dev from origin. chenhuachaodeMacBook-Pro:repository chenhuachao$ ls test.txt chenhuachaodeMacBook-Pro:repository chenhuachao$ git pull #成功拉取 git@192.168.100.136's password: Auto-merging test.txt CONFLICT (content): Merge conflict in test.txt Automatic merge failed; fix conflicts and then commit the result. chenhuachaodeMacBook-Pro:repository chenhuachao$ ls dev.txt test.txt chenhuachaodeMacBook-Pro:repository chenhuachao$ cat dev.txt add branch dev
这样就可以在A机器上的dev分支进行修改提交推送了。同样，也可以在dev分支下，继续创建分支，比如修复某个bug，不再详解。
分支合并：
比如说，现在有一个bug1需要解决。在dev分支下新建bug1分支，并切换到bug1分支进行修改，提交，合并
[root@chenhuachao repository]# git branch bug1 [root@chenhuachao repository]# git checkout bug1 Switched to branch 'bug1' [root@chenhuachao repository]# git branch * bug1 dev master [root@chenhuachao repository]# ls dev.txt test.txt [root@chenhuachao repository]# vim dev.txt [root@chenhuachao repository]# cat dev.txt add branch dev repair bug1 [root@chenhuachao repository]# git add dev.txt [root@chenhuachao repository]# git commit -m "repair bug1" [bug1 9ebf491] repair bug1 1 files changed, 1 insertions(+), 0 deletions(-) [root@chenhuachao repository]# git checkout dev Switched to branch 'dev' 合并bug1分支到dev [root@chenhuachao repository]# git merge bug1 Updating 820e19f..9ebf491 Fast-forward #这里合并说使用的fast-forward方法。建议使用git merge --no-ff -m "repair bug1" bug1命令进行合并，可以记录日志信息 dev.txt | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) [root@chenhuachao repository]# git branch -d bug1 Deleted branch bug1 (was 9ebf491). [root@chenhuachao repository]# cat dev.txt add branch dev repair bug1
这里就可以推送分支dev到远程git仓库。
日志信息，图形化现实缩略信息命令
[root@chenhuachao repository]# git log --graph --pretty=oneline --abbrev-commit * 9ebf491 repair bug1 * 820e19f add branch dev * 2db34db add 1 * aa68ea5 modify test with A * 6ff7cc8 add test file
隐藏分支：
[root@chenhuachao repository]# git checkout -b bug2
Switched to branch 'bug2'
[root@chenhuachao repository]# ls
dev.txt test.txt
[root@chenhuachao repository]# cat dev.txt
add branch dev
[root@chenhuachao repository]# git branch
* bug2
dev
master
[root@chenhuachao repository]# vim dev.txt
[root@chenhuachao repository]# git stash
Saved working directory and index state WIP on bug2: 820e19f add branch dev
HEAD is now at 820e19f add branch dev
[root@chenhuachao repository]# git branch
* bug2
dev
master
[root@chenhuachao repository]# git stash list
stash@{0}: WIP on bug2: 820e19f add branch dev
[root@chenhuachao repository]# git stash pop
# On branch bug2
# Changed but not updated:
# (use "git add <file>..." to update what will be committed)
# (use "git checkout -- <file>..." to discard changes in working directory)
#
# modified: dev.txt
#
no changes added to commit (use "git add" and/or "git commit -a")
Dropped refs/stash@{0} (3ac6925cb085c50293b7adbb1c17a450fdaadb50)更多git命令，需要不断摸索。
##仓库迁移
1、 从原地址克隆一份裸版本库，比如原本托管于 GitHub。
git clone --bare git://github.com/username/project.git
2、从新的git服务器新建一个git仓库
git init -bare newproject.git
chown -R git:git newproject.git
3、进入第一步刚克隆的裸版本库中。
cd project.git git push --mirror git@gitcafe.com/username/newproject.git
4、删除旧版本库即可
