gitlab 密钥登录问题

问题描述：
输入 git push -u origin master后提示：
Permission denied (publickey). fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.
解决办法：
输入 ssh -i 密钥存放地址/密钥名字 git@gitlab.com
输入eval ssh-agent -s
输入ssh-add 密钥存放地址/密钥名