ssh-key Permission denied (publickey)

https://help.github.com/articles/error-permission-denied-publickey/  




$ ssh-keygen 
Generating public/private rsa key pair. 
Enter file in which to save the key ( /home/wz/ .ssh/id_rsa): 
/home/wz/ .ssh/id_rsa already exists. 
Overwrite (y/n)? y 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in  /home/wz/ .ssh/id_rsa. 
Your public key has been saved in  /home/wz/ .ssh/id_rsa.pub. 
The key fingerprint is: 
e9:e3:2a:7b:c4:e1:b2:d3:8c:ce:40:4a:07:fb:42:18 wz@wz-computer 
The key's randomart image is: 
+--[ RSA 2048]----+ 
|                 | 
|                 | 
|E.               | 
|..o   .  .       | 
|.+.. o .S        | 
|ooo . +.         | 
|.... B  o        | 
|  .o= +. .       | 
|   .+=...        | 
+-----------------+ 
$ ll ~/.ssh 
total 20 
drwx------  2 wz wz 4096  2月  2 13:26 ./ 
drwxr-xr-x 30 wz wz 4096  2月  2 13:26 ../ 
-rw-------  1 wz wz 1679  2月  2 13:48 id_rsa 
-rw-------  1 wz wz  396  2月  2 13:48 id_rsa.pub 
-rw-------  1 wz wz 2210  2月  2 13:44 known_hosts 



$ ssh  [email protected]  
Agent admitted failure to sign using the key. 
Permission denied (publickey). 
$ ssh-add -l 
2048 e9:e3:2a:7b:c4:e1:b2:d3:8c:ce:40:4a:07:fb:42:18 wz@wz-computer (RSA) 

$ eval "$(ssh-agent -s)" 
Agent pid 9424 
$ ssh-add -l 
The agent has no identities. 
$ ssh-add -l -E md5 
The agent has no identities. 
$ ssh-add  (需要添加一下才能生效)
Identity added:  /home/wz/ .ssh/id_rsa ( /home/wz/ .ssh/id_rsa) 
$ ssh-add -l 
2048 e9:e3:2a:7b:c4:e1:b2:d3:8c:ce:40:4a:07:fb:42:18  /home/wz/ .ssh/id_rsa (RSA) 
$ ssh-add -l -E md5 
2048 e9:e3:2a:7b:c4:e1:b2:d3:8c:ce:40:4a:07:fb:42:18  /home/wz/ .ssh/id_rsa (RSA) 

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