I have one master and four slave computers. I generated rsa public/private key on master PC. Then I copied publickey (id_rsa.pub) to slave machines as authorized_keys.

It doesn't ask password when I invoke SSH like this on master PC's terminal:

ssh –o UserKnownHostsFile=/dev/null –o StrictHostKeyChecking=no hduser@slave1 

I wrote this script to automatically login slave machines without asking password.

SERVER_LIST=`cat /home/hduser/slaves` # slave1, slave2 ...

USERNAME=hduser

for host in $SERVER_LIST; do 

ssh –t –o UserKnownHostsFile=/dev/null –o StrictHostKeyChecking=no -l ${USERNAME} ${host}; 

done

SSH is asking slaves passwords when I use this script. I'm getting this message when use SSH with -vv option:

I changed permissions on master PC and slave PC.

sudo chmod 700 -R ~/.ssh

sudo chown hduser ~/.ssh

It still asking password. What am I missing? How can I fix it?