Agent admitted failure to sign using the key

使用SSH key 登入伺服器時.
當key值有更動可能會遇到:

Agent admitted failure to sign using the key.
Permission denied (publickey).

解決方法：

# start the ssh-agent in the background
eval "$(ssh-agent -s)"
Agent pid xxxx
ssh-add ~/.ssh/my_other_key

執行成功之後
會出現類似訊息：
Identity added: ～/.ssh/my-ssh-key (～/.ssh/my-ssh-key)
再次嘗試登入server即可