Mac系统生成publicKey(ssh .pub key)

iOS开发中不免要上传gitHub上或者公司要求git管理代码，就会需要你本机生成的ssh publickey。

下面把生成的.pub文件传给后台或服务器就好了：

1、打开终端：$ ssh -v

 会出现：

     usage: ssh [-1246AaCfGgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]

             [-D [bind_address:]port] [-E log_file] [-e escape_char]

             [-F configfile] [-I pkcs11] [-i identity_file] [-L address]

             [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]

             [-Q query_option] [-R address] [-S ctl_path] [-W host:port]

             [-w local_tun[:remote_tun]] [user@]hostname [command]

 说明你的电脑有ssh文件；
2、然后就要去生成了：
             $ ssh-keygen
就会出现以下代码：然后一路 ：Enter

Generating public/private rsa key pair.

Enter file in which to save the key (/Users/yinqiangqiang/.ssh/id_rsa): 

/Users/yinqiangqiang/.ssh/id_rsa already exists.

Overwrite (y/n)? y

Enter passphrase (empty for no passphrase): 

Enter same passphrase again: 

Your identification has been saved in /Users/yinqiangqiang/.ssh/id_rsa.

Your public key has been saved in /Users/yinqiangqiang/.ssh/id_rsa.pub.

The key fingerprint is:

SHA256:8QPUtJr5g4NCKiwJXHkYQ7V27NjZmMQF9Md0N/2edKs yinqiangqiang@yinqianangdeMBP

The key's randomart image is:

+---[RSA 2048]----+

|  .+...oo+.. . o.|

|    = +.o +.. . o|

|   + + =o..o    .|

|. . o * =B.    .o|

|..  .. *S.o   ..+|

|o. o   . o .   o.|

|+.. . . o o   .  |

|..   .   . . E   |

|                 |

+----[SHA256]-----+
生成成功，然后 打开，由于这是一个隐藏文件。所以用终端打开比较方便
3、打开：

     
$ ls -a ~/.ssh
显示：

. ..
id_rsa id_rsa.pub
known_hosts

生成成功。

这个id_rsa.pub 就是我们要得到的公钥。