今天尝试从BitBucket通过SSH下载项目，发现下载失败报如下错误：
git@bitbucket.org: Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights原来是本机没有设置SSH Keys给BitBucket，立即创建一个。
1.首先可以通过命令测试一下是否连接成功：
> ssh -T git@bitbucket.org
git@bitbucket.org: Permission denied (publickey). // 报错显示无权限2.接下来创建密钥。
> ssh-keygen -t rsa -C "youremailname@gmail.com"添加命令参数-f othername，可以自定义存放密钥的文件名，如：ssh-keygen -t rsa -C “youremail@gmail.com” -f 。
可以通过-h查看更多命令参数的使用，如：ssh-keygen -h。
默认情况下，命令会在/Users/yourusername/.ssh/目录下创建id_rsa和id_rsa.pub两个文件。id_rsa存的是私钥，id_rsa.pub存的是公钥。
(base) yourname@Mac BitBucket % ssh-keygen -t rsa -C "youremailname@gmail.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/yourname/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /Users/yourname/.ssh/id_rsa
Your public key has been saved in /Users/yourname/.ssh/id_rsa.pub
The key fingerprint is:
SHA256:hpGRCvxfRqPcHUhhuCWzcVkQI3YuV821QzL7B7/e0aE youremailname@gmail.com
The key's randomart image is:
+---[RSA 3072]----+
| . ++OBooo.o |
| o .*BBo. o= . |
| o o+%oo .. + |
| o ==+ . . + |
| ..oS ..o|
| .. ..+|
| E o.|
| . o|
| ..|
+----[SHA256]-----+接下来将id_rsa.pub文件中的公钥内容拷贝到BitBucket，
最后用命令测试一下是否连接成功。出现以下提示表示连接成功。
> ssh -T git@bitbucket.org
authenticated via ssh key.
You can use git to connect to Bitbucket. Shell access is disabled接下来就可以从BitBucket通过SSH下载项目了。