How to realize ssh login without password when setting up big data's environment

Editor to share with you how to build big data environment to achieve ssh password-free login, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Yum search ssh: query installable ssh packages

Yum install-y openssh: install SSH package

Yum list installed openssh: query whether openssh is installed

Configure password-free login

1. Switch from root user to hadoop user

2. Create the. ssh file under the root path (/ home/hadoop)

Mkdir .ssh

3. Generate key

Ssh-keygen-t rsa-P ""

4. Enter the .ssh directory

Cd .ssh

5. Ls view

Look, there are public keys and private keys in it.

6. Put the public key into the linux authentication

Cp id_rsa.pub authorized_keys

7. Ls check that there is an authentication file authorized_keys in the directory

8. Check the specific content

Vi authorized_keys

9. Exit to the root directory for .ssh authorization

Chmod 700.ssh (RRV 4 wRV 2 x RV 1)

Chmod 6000.ssh / *

10. Test ssh with ssh hostname

Ssh cjqlinux

Configure sudo

1. Visudo goes to the editing page

2. Find the line root ALL = (ALL) ALL and copy and change the line.

3. Change the root user name to another user name to be configured.

4.: X Save and exit

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