passwordless ssh – ssh without a password

“ssh without password” is a must for many cluster solutions. I encountered this when I started to play with apache spark. The following is how:

From master=>

ssh-keygen [enter enter]

This will generate id_rsa and id_rsa.pub. Next, we will put the public key to a slave. Luckily, ssh-copy-id is the tool to do the job.

ssh-copy-id -i ~/.ssh/id_rsa.pub [slaveIP e.g. 1. 2. 3. 4.]

Now we should be able to ssh ‘remote IP’ without ip using current username.

Reference

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One thought on “passwordless ssh – ssh without a password

  1. Aw, this was an incredibly nice post. Spending some time and actual effort to generate a really good article… but
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    to get anything done.

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