SSH-Free Login configuration

Recently engaged in Hadoop all involved master to slave landing, in order to simplify all the master access to all slave are configured as a no-login method, specific steps:

1. Create the key on the master machine:

Ssh-keygen-t Rsa-p '

The public key will be generated under the. SSH folder: id_rsa.pub; key: Id_rsa

2. Add the public key to the Authorized_keys:

Cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

3. Copy the Authorized_keys into the slave:

SCP ~/.ssh/authorized_keys slave1:~/.ssh/

Because I did the machine name and IP mapping on master, all slave1 can use the IP address to replace

4, login slave1 machine modify. SSH and Authorized_keys permissions (required, otherwise enter the password):

chmod. SSH

chmod Authorized_keys

5, this can be achieved in the master Access slave1 password-free login.

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