Linux SSH free key authentication

Both Hadoop and ansible need this stuff, which is really simple.

First, generate the public and private keys on the machine that requires a secret-free login:

Ssh-keygen

Second, the copy-generated public key is id_rsa.pub to the remote machine:

Ssh-copy-id-i/root/.ssh/id_rsa.pub [email protected] #用此方式拷贝的好处是不用改名

Then login to the 192.168.0.247 machine will not need a password.

[Email protected]_server ~]# ssh 192.168.0.247Last login:mon Nov 13:48:33 from 192.168.0.3[[email protected] ~]#

If you are a regular account, you will need to switch to the normal account before generating the public and private keys.

This article from "Small East elder brother" blog, declined reprint!

Linux SSH free key authentication