git@github.com: Permission denied (publickey). fatal: Could not read from remote repository.

1.创建新的ssh密钥：
ssh-keygen -t rsa -b 4096 -C "flashaq@hotmail.com"
2.添加到github账号
https://github.com/settings/keys
SSH keys-》new ssh key
添加cat .ssh/id_rsa.pub

ssh -T git@github.com
ok！