mac下github代码仓库建立流程

1. 在github.com上注册账户，建立代码仓库(免费用户只能建立公共仓库)。
   
   
2. 安装git客户端(Tower)。
   
3. 测试连接。github使用ssh连接，需要设置ssh，利用ssh-keygen生成密钥对：
   
   在终端 打开.ssh目录，cd ~/.ssh
   
   ssh-keygen 回车Generating public/private rsa key pair.
   Enter file in which to save the key (/Users/admin/.ssh/id_rsa): demo_rsa
   Enter passphrase (empty for no passphrase): 
   Enter same passphrase again: 
   Your identification has been saved in demo_rsa.
   Your public key has been saved in demo_rsa.pub.
   The key fingerprint is:
   30:de:c3:ac:35:41:26:f0:86:42:8e:fa:3c:f6:04:59 admin@admindeMac-mini.local
   The key's randomart image is:
   +--[ RSA 2048]----+
   |  . ... o        |
   | +   o +         |
   |. o E = .        |
   |.  + o * .       |
   |. o   . S        |
   | o .   o o       |
   |  = . .          |
   | . +             |
   |    .            |
   +-----------------+
   
   生成demo_rsa(私钥)和demo_rsa.pub（公钥）两个文件。
   
   打开github中的代码仓库项目，进入项目settings->Deploy Keys->add deploy key,拷贝demo.rsa.pub中的全部内容到Key中，Add key保存。
   
   使用demo_rsa测试连接,在终端输入: ssh -v git@github.com -i demo_rsa 回车
   
   debug1: Reading configuration data /etc/ssh_config
   debug1: /etc/ssh_config line 20: Applying options for *
   debug1: Connecting to github.com [192.30.252.128] port 22.
   debug1: Connection established.
   debug1: identity file wsw_rsa type 1
   debug1: identity file wsw_rsa-cert type -1
   debug1: Enabling compatibility mode for protocol 2.0
   debug1: Local version string SSH-2.0-OpenSSH_6.2
   debug1: Remote protocol version 2.0, remote software version libssh-0.6.3
   debug1: no match: libssh-0.6.3
   debug1: SSH2_MSG_KEXINIT sent
   debug1: SSH2_MSG_KEXINIT received
   debug1: kex: server->client aes128-ctr hmac-sha1 none
   debug1: kex: client->server aes128-ctr hmac-sha1 none
   debug1: sending SSH2_MSG_KEXDH_INIT
   debug1: expecting SSH2_MSG_KEXDH_REPLY
   debug1: Server host key: RSA 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48
   debug1: Host 'github.com' is known and matches the RSA host key.
   debug1: Found key in /Users/admin/.ssh/known_hosts:1
   debug1: ssh_rsa_verify: signature correct
   debug1: SSH2_MSG_NEWKEYS sent
   debug1: expecting SSH2_MSG_NEWKEYS
   debug1: SSH2_MSG_NEWKEYS received
   debug1: Roaming not allowed by server
   debug1: SSH2_MSG_SERVICE_REQUEST sent
   debug1: SSH2_MSG_SERVICE_ACCEPT received
   debug1: Authentications that can continue: publickey
   debug1: Next authentication method: publickey
   debug1: Offering RSA public key: wsw_rsa
   debug1: Server accepts key: pkalg ssh-rsa blen 279
   debug1: read PEM private key done: type RSA
   debug1: Authentication succeeded (publickey).
   Authenticated to github.com ([192.30.252.128]:22).
   debug1: channel 0: new [client-session]
   debug1: Entering interactive session.
   debug1: Sending environment.
   debug1: Sending env LANG = zh_CN.UTF-8
   PTY allocation request failed on channel 0
   debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
   Hi redparrots/cpp2txt! You've successfully authenticated, but GitHub does not provide shell access.
   debug1: channel 0: free: client-session, nchannels 1
   Connection to github.com closed.
   Transferred: sent 3448, received 1968 bytes, in 0.9 seconds
   Bytes per second: sent 3796.5, received 2166.9
   debug1: Exit status 1
   
   出现绿色部分，说明授权成功。
   
   如出现
   ....
   debug1: Offering RSA public key: /Users/admin/.ssh/id_rsa
   debug1: Authentications that can continue: publickey
   debug1: Trying private key: /Users/admin/.ssh/id_dsa
   debug1: No more authentication methods to try.
   Permission denied (publickey).
   
   说明使用的密钥不匹配。（注意：ssh如果没有指定 -i [rsa path]参数，默认使用id_rsa授权文件, 你可以/etc/ssh/ssh_config文件中改变IdentitiyFile 所指向的默认授权文件；-v 参数打开调试信息）
   
   
4. git 克隆github项目到本地
   
   git clone https://github.com/redparrots/cpp2txt.git
   
   git clone命令详细命令可参照git clone参数详解。
   
   
5. git 添加本地文件
   
   git add -A
   
   
6. git 提交更改
   
   git commit -m "commit info"
   
   
7. git 推送本地更改到github
   
   git push
   
   
8. git 更新到本地
   
   git pull
   
   
9. 更多git命令可参考http://www.oschina.net/question/565065_86025