为github帐号添加SSH keys

使用git clone命令从github上同步github上的代码库时，如果使用SSH链接（如我自己的beagleOS项目：[email protected]:DamonDeng/beagleOS.git），而你的SSH key没有添加到github帐号设置中，系统会报下面的错误：

Permission denied (publickey).

fatal: The remote end hung up unexpectedly

这时需要在本地创建SSH key，然后将生成的SSH key文件内容添加到github帐号上去。

创建SSH key的方法很简单，执行如下命令就可以：

ssh-keygen

然后系统提示输入文件保存位置等信息，连续敲三次回车即可，生成的SSH key文件保存在中～/.ssh/id_rsa.pub

然后用文本编辑工具打开该文件，我用的是vim,所以命令是：

vim ~/.ssh/id_rsa.pub

接着拷贝.ssh/id_rsa.pub文件内的所以内容，将它粘帖到github帐号管理中的添加SSH key界面中。

打开github帐号管理中的添加SSH key界面的步骤如下：

1. 登录github

2. 点击右上方的Accounting settings图标

3. 选择 SSH key

4. 点击 Add SSH key

在出现的界面中填写SSH key的名称，填一个你自己喜欢的名称即可，然后将上面拷贝的~/.ssh/id_rsa.pub文件内容粘帖到key一栏，在点击“add key”按钮就可以了。

添加过程github会提示你输入一次你的github密码

添加完成后再次执行git clone就可以成功克隆github上的代码库了。

来源：http://blog.csdn.net/keyboardota/article/details/7603630

更权威查看： https://help.github.com/articles/generating-ssh-keys

cd ~/.ssh
# Checks to see if there is a directory named ".ssh" in your user directory

ls
# Lists all the subdirectories in the current directory
# config  id_rsa  id_rsa.pub  known_hosts

mkdir key_backup
# Makes a subdirectory called "key_backup" in the current directory

cp id_rsa* key_backup
# Copies the id_rsa keypair into key_backup

rm id_rsa*
# Deletes the id_rsa keypair

ssh-keygen -t rsa -C "[email protected]"
# Creates a new ssh key using the provided email
# Generating public/private rsa key pair.
# Enter file in which to save the key (/home/you/.ssh/id_rsa):

Enter passphrase (empty for no passphrase): [Type a passphrase]
Enter same passphrase again: [Type passphrase again]

Your identification has been saved in /home/you/.ssh/id_rsa.
Your public key has been saved in /home/you/.ssh/id_rsa.pub.
The key fingerprint is:
01:0f:f4:3b:ca:85:d6:17:a1:7d:f0:68:9d:f0:a2:db [email protected]

sudo apt-get install xclip
# Downloads and installs xclip

xclip -sel clip < ~/.ssh/id_rsa.pub
# Copies the contents of the id_rsa.pub file to your clipboard

Go to your Account Settings
Click "SSH Keys" in the left sidebar
Click "Add SSH key"
Paste your key into the "Key" field
Click "Add key"
Confirm the action by entering your GitHub password

为github帐号添加SSH keys

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