remote login to slave from master

ssh slave

permission denied(public key)

the above line is an error msg when i m tryin to login to slave from master node.. what is the problem any开发者_高级运维 anyone tel.??

It means that you haven't setup key exchange on the slave. You can find a tutorial here:

https://help.ubuntu.com/community/SSH/OpenSSH/Keys

Note that you will need access to the slave machine to complete this, so you will need to either physically use the machine or have the sysadmin do it for you.