Linux里面repo文件作用是什么？

repo 文件是 yum 源（软件仓库）的配置文件，通常一个 repo  文件定义了一个或者多个软件仓库的详细信息，例如我们将从哪里下载、安装、升级软件包，repo 文件中的设置将被 yum  读取和应用

以下就是搭建repo服务器端的步骤，有了它我们也能像Android项目那样在linux系统下同时管理几百个工程了。

Step 1. 构建git server (ip is 192.168.5.141).

Step 2. Run following commands to initialized manifest.git repository on the server machine with "Frank" user privilege.

mkdir repositories

cd repositories

git init --bare manifest.git

Step 3. Run following commands to initialized a test git repository in the same path with manifest.git with "Frank" user privilege.

cd repositories

git init --bare project1.git

Step 4. Run following command on the server machine with administrator privilege.（有什么用？）

sudo gedit /etc/sv/git-daemon/run

Modify the last line to:

exec git-daemon --verbose --enable=receive-pack --export-all <strong>--base-path=/home/Frank/repositories</strong>

 Reboot the machine

Step 5. Customize manifest.git

Login a client machine, run following command to clone manifest.git repository:

mkdir MyRepo

cd MyRepo

git clone Frank@192.168.5.141:repositories/manifest.git

cd manifest

Create a default.xml file with following content:

<?xml version=<span 

class="code-quote">"1.0"</span> encoding=<span 

class="code-quote">"UTF-8"</span>?>

<strong><manifest></strong>

<remote name=<span class="code-quote">"korg"</span> 

 fetch=<span class="code-quote">"git:<span 

class="code-comment">//192.168.5.141/"</span> review=<span 

class="code-quote">"review.source.android.com"</span> />

</span>

<strong>

<<span class="code-keyword">default</span> 

revision=<span class="code-quote">"master"</span> 

remote=<span class="code-quote">"korg"</span> />

<project path=<span class="code-quote">"project1"</span> 

name=<span class="code-quote">"project1"</span> 

/></strong>

</manifest>

Run following command to commit default.xml file

git add --all

git commit -a -m <span class="code-quote">"add <span class="code-keyword">default</span>.xml"</span>

git push --all

Step 6. Customize Project1.git

Login a client machine, run following command to clone project1.git repository:

cd MyRepo

git clone Frank@192.168.5.141:repositories/project1.git

cd project1

echo <span class="code-quote">"Hello Project1"</span> > Hello.txt

Run following command to commit Hello.txt file

git add --all

git commit -a -m <span class="code-quote">"add Hello.txt"</span>

git push --all

Step 7. Test the repo server

Run following command on the client machine side.

mkdir bin

<pre>

curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo 

chmod a+x ~/bin/repo

Export ~/bin to system enviroment path.

mkdir MyProject

cd MyProject

<strong>

repo init -u git:</strong><span class="code-comment"><strong>//192.168.5.141/manifest.git</strong>

</span>

repo sync

使用yum进行安装，为了提高速度，最好先是修改为中国CentOS镜像服务器。目前国内有三个镜像可以选择，分别是：中国科学技术大学、163和Sohu的镜像，建议教育网用户选择中科大，电信用户选择163，他们的repo文件本博客作了备份如下：

http://yupengyan.com/wp-content/uploads/2012/02/CentOS6-Base-163.repo_.txt

http://yupengyan.com/wp-content/uploads/2012/02/CentOS6-Base-sohu.repo_.txt

http://yupengyan.com/wp-content/uploads/2012/02/CentOS6-Base-ustc.repo_.txt

下面命令是备份CentOS-Base.repo文件，并修改使用163镜像作为yum源：

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.save

wget http://mirrors.163.com/.help/CentOS6-Base-163.repo

mv CentOS6-Base-163.repo /etc/yum.repos.d/CentOS-Base.repo

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