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On most systems the default private keys (~/.ssh/id_rsa, ~/.ssh/id_dsa and ~/.ssh/identity) are automatically added to the SSH authentication agent. You shouldn‘t need to run ssh-add path/to/key unless you override the file name when you generate a key.
Permission denied (publickey).
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原文地址：http://www.cnblogs.com/ron123/p/5551551.html
