一、Permission denied (publickey)

1. git指令出现Permission denied (publickey),是ssh key过期的问题,需要对ssh key进行更新,所有设置都选择默认

   ssh-keygen

2. ssh key公钥将被默认存储在～/.ssh/id_rsa.pub （～/.ssh/id_rsa存储的是私钥）

   cat ~/.ssh/id_rsa.pub

3. 打开github，右上角打开settings，找到ssh key并将所有内容粘贴即可解决问题

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二、Permissions 0744 for ‘/root/.ssh/id_rsa’ are too open处理

1. 把权限降到0600就ok了

   chmod 0600 ~/.ssh/id_rsa