ssh scp ssh-copy-id把新证书公钥传到 服务器上

升级了电脑。ssh证书也升级了，服务器设置了只能通过证书登录。user@host: Permission denied (publickey).

see man ssh_config. Usually this can be done by adding the following statement to the config file:

PubkeyAuthentication yes

如何把新证书传到服务器上去。
把新证书公钥传到 服务器file:  ~/.ssh/authorized_keys 

ssh-copy-id -i "~/.ssh/old/id_rsa" user@host

也可以分几步处理。
scp -i "~/.ssh/bak/id_rsa" -p your_pub_key.pub user@host:
ssh user@host
host$ cat id_dsa.pub >> ~/.ssh/authorized_keys

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