mac系统github如何clone到本地与上传
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MAC 上安装Git主要有两种方式
首先查看电脑是否安装Git，终端输入：
git
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安装过则会输出：
usage: git [--version] [--help] [-C <path>] [-c name=value]
[--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
[-p | --paginate | --no-pager] [--no-replace-objects] [--bare]
[--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
<command> [<args>]
These are common Git commands used in various situations:
start a working area (see also: git help tutorial)
clone Clone a repository into a new directory
init Create an empty Git repository or reinitialize an existing one
work on the current change (see also: git help everyday)
add Add file contents to the index
mv Move or rename a file, a directory, or a symlink
reset Reset current HEAD to the specified state
rm Remove files from the working tree and from the index
examine the history and state (see also: git help revisions)
bisect Use binary search to find the commit that introduced a bug
grep Print lines matching a pattern
log Show commit logs
show Show various types of objects
status Show the working tree status
grow, mark and tweak your common history
branch List, create, or delete branches
checkout Switch branches or restore working tree files
commit Record changes to the repository
diff Show changes between commits, commit and working tree, etc
merge Join two or more development histories together
rebase Reapply commits on top of another base tip
tag Create, list, delete or verify a tag object signed with GPG
collaborate (see also: git help workflows)
fetch Download objects and refs from another repository
pull Fetch from and integrate with another repository or a local branch
push Update remote refs along with associated objects
'git help -a' and 'git help -g' list available subcommands and some
concept guides. See 'git help <command>' or 'git help <concept>'
to read about a specific subcommand or concept.
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通过homebrew安装Git
未安装homebrew，需安装homebrew
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
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安装git
brew install git
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通过Xcode安装
直接从AppStore安装Xcode，Xcode集成了Git，不过默认没有安装，你需要运行Xcode，选择菜单“Xcode”->“Preferences”，在弹出窗口中找到“Downloads”，选择“Command Line Tools”，点“Install”就可以完成安装了。
设置username和email（github每次commit都会记录他们）
git config --global user.name "wenbo"
git config --global user.email "xxxxxxx@xxx.com"
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通过终端命令创建ssh key
ssh-keygen -t rsa -C "xxxxxx@xxx.com"
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xxxxxxx@xx.com是邮件名，回车会有以下输出
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/WENBO/.ssh/id_rsa):
/Users/WENBO/.ssh/id_rsa already exists.
Overwrite (y/n)? n
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由于这里我原来已经创建过，这里我选n，没有创建过的，会要求确认路径和输入密码，我们这使用默认的一路回车就行。成功的话会在~/下生成.ssh文件夹，进去，打开id_rsa.pub，复制里面的key。
终端查看.ssh/id_rsa.pub文件
open .ssh/id_rsa.pub`
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回车后，就会新弹出一个终端，然后复制里面的key。
或者用cat命令查看
cat .ssh/id_rsa.pub
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登录GitHub（默认你已经注册了GitHub账号），添加ssh key，点击Settings，如图
点击New SSH key，如图
添加key，如图
链接验证
ssh -T git@github.com
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终端输出结果
$ ssh -T git@github.com
Hi xxxxx You've successfully authenticated, but GitHub does not provide shell access.
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说明已经链接成功。
在GitHub上新创建一个 repository或者Start a Project，如图：
填写项目信息，如下图所示：
点击Create repository,就创好一个工程了。
Clone工程到本地，首先复制ssh 地址
打开终端，这里只是测试，我想把工程克隆在桌面，首先在终端中切换路径到桌面，输入以下命令：
cd /Users/xxxx/Desktop/
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(xxxx是自己mac的名字）
然后克隆项目,终端输入
git clone (这里是复制的SSH链接，直接command+v就可以了）
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下载完成了之后，工程已经被克隆到桌面了。
在Xcode中新创建一个工程，保存的路径为刚刚克隆下来的LearnGit文件夹下，如下图所示：
提交修改，首先切换到LearnGit文件路径：
cd /Users/xxxx/Desktop/LearnGit
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这里xxxx是mac的名字
然后输入：
//文件添加到仓库（.代表提交所有文件）
git add .
//把文件提交到仓库
git commit -m "First Commit"
//上传到github
git push
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终端完整输出如下：
[master ae3bbe9] First Commit
11 files changed, 649 insertions(+)
create mode 100644 LearnGitDemo/LearnGitDemo.xcodeproj/project.pbxproj
create mode 100644 LearnGitDemo/LearnGitDemo.xcodeproj/project.xcworkspace/contents.xcworkspacedata
create mode 100644 LearnGitDemo/LearnGitDemo/AppDelegate.h
create mode 100644 LearnGitDemo/LearnGitDemo/AppDelegate.m
create mode 100644 LearnGitDemo/LearnGitDemo/Assets.xcassets/AppIcon.appiconset/Contents.json
create mode 100644 LearnGitDemo/LearnGitDemo/Base.lproj/LaunchScreen.storyboard
create mode 100644 LearnGitDemo/LearnGitDemo/Base.lproj/Main.storyboard
create mode 100644 LearnGitDemo/LearnGitDemo/Info.plist
create mode 100644 LearnGitDemo/LearnGitDemo/ViewController.h
create mode 100644 LearnGitDemo/LearnGitDemo/ViewController.m
create mode 100644 LearnGitDemo/LearnGitDemo/main.m
WMBdeMacBook-Pro:LearnGit WENBO$ git push
Warning: Permanently added the RSA host key for IP address '192.30.255.112' to the list of known hosts.
Counting objects: 20, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (18/18), done.
Writing objects: 100% (20/20), 6.80 KiB | 0 bytes/s, done.
Total 20 (delta 2), reused 0 (delta 0)
remote: Resolving deltas: 100% (2/2), done.
To github.com:wenmobo/LearnGit.git
1000218..ae3bbe9 master -> master
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查看GitHub上的项目，LearnGit已经上传成功啦。
