git项目克隆Permission denied (publickey). fatal: Could not read from remote reposito

装完git，然后clone github的项目时出问题，报以下错误

Permission denied (publickey).
  fatal: Could not read from remote repository.

  Please make sure you have the correct access rights

  Permission denied (publickey).
  fatal: Could not read from remote repository.

  Please make sure you have the correct access rights

从这可以看出这是ssh key没有添加的问题，需要把自己电脑的ssh key公钥添加到git上。

1.生成SSH Keys
如果已经生存了ssh key,那就可以跳过这一步了。可以用以下命令查看
ls -l ~/.ssh

如果出现id_rsa 和 id_rsa_pub 那就说明已经生成。

如果没有，按一下步骤生成
ssh-keygen -t rsa -C “your_email@example.com”

2.将.Key 添加到ssh-agent
查看ssh-agent是否启用

ssh-agent -s

如果看到Agent pid xxxxx 那就说明已经启用
然后把私钥添加到ssh-agent就可以了。

ssh-add ~/.ssh/id_rsa

3.将ssh的公钥添加到git上
查找公钥

cd ~/.ssh

cat id_rsa.pub    或者vim id_rsa.pub

得到如下类似公钥：

ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDg5WBC86Dgoa6sBm/eH3uRNS9arYEXCgnBh/LiQy2cwHL1UQvxYvV2zYGx0Sz7sVgrZlS0nTR9fZgcLiyDwPo72vV95v1mI10Jis4OPIZkq2UmWm2yIieYkPo3tJPKN9JnKhm2ajf9kfKDWkvZd2PkZBWDqd1PZJ6VAX9d5pJWzaw1fcR5K/lReTCfmHii7TkoNSRceB8iiqLVZ8wLFmZUeo59qHjZeMckehrryGSWUGn36KWgdND8sAuckR2shi

打开gitHub或者gitLab在依次进入settings–>ssh keys–>add ssh key 然后把你的公钥添加进这里就ok了。