Methods open up much to say, and sometimes there will not need a password to get through the situation this time is generally the following two questions:
1. $ {HOME}, $ {HOME} /. Ssh, $ {HOME} /. Ssh / authorized_keys permission right, can be viewed in / var / log / secure in.
2. pub key copy right, if the / var / log / secure reporting the error: key_read: uudecode *** failed, usually pub key copy right, pay attention pub key is written on one line, if you use the mouse to copy, easy to copy multiple lines.
Reproduced in: https: //www.cnblogs.com/FrankTan/archive/2011/02/20/1958903.html