SSH no password hand set

SSH no password hand set

As a result of many online configuration without password login is very bad use, I simply write a put up a total of the reference, I have prepared 3 test machines, the demand is that these three machines can not use the password to access each other.

Steps as follows: Www.pcjsh.com

Java code

192.168.100.67 Master

192.168.100.68 slave1

192.168.100.69 Slave2

Enter master (Hadoop user)

Perform:

SSH-KEYGEN-T RSA

Enter ~/.ssh Directory

The generated Id_rsa id_rsa.pub

CP Id_rsa.pub Authorized_keys

And then confirm that Authorized_keys's permission is 600 if it's not chmod id_rsa the rest is 644.

Then SSH master Date test

Enter slave1 (Hadoop user)

Enter ~/.ssh Directory

ssh-keygen-t RSA on Master

Put it in the directory

chmod Id_rsa

Then SSH slave1 Date test

and master and slave1 test each other.

Slave2 and Slave1

In fact, CP Id_rsa.pub Authorized_keys does not matter, it is best to use cat command, I This is a map of the trouble, and I am too lazy to skillfully SCP so troublesome point, in fact this is very easy to understand that 3 machines use the same private key, so the public key to generate a set of enough

Of course, the permissions of the three-machine ~/.ssh directory and the following files must be identical, if not different.

I generally for the sake of convenience, three machines are running the ssh-keygen-t RSA command, and then a machine generated key pairs cover the rear two machines, and chmod into the same permissions, that is Id_rsa id_rsa.pub 644 Authorized_keys 644.

Because of the same key, so you can connect yourself can be successfully connected to other machines, if not connected to see if the/etc/hosts file is not configured.

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