openwrt ssh和scp 免密码登入或传输

机器1:ubuntu 1404  机器2：openwrt   
实现ubuntu免密码登入openwrt
ubuntu：
点击(此处)折叠或打开

listome-bao@listomebao-computer:~$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/listome-bao/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/listome-bao/.ssh/id_rsa.
Your public key has been saved in /home/listome-bao/.ssh/id_rsa.pub.
The key fingerprint is:

生成了id_rsa.pub 将其传到openwrt 的 /etc/dropbear/ 下改成authorized_keys

         
        即可

之前如果建立 ssh 连接，只要將公钥复制到 ~/.ssh/authorized_keys 就可以利用公钥登入，而不需要建立密码。

现在的 ssh 使用同样的方法会出現错误信息：

Agent admitted failure to sign using the key

解決方法：

使用 ssh-add 指令將私钥加进来（根据个人的密匙命名不同更改 id_rsa）
# ssh-add   ~/.ssh/id_rsa