Big Data Environment Build--ssh No password login

Yum Search ssh: query for an installable SSH package

Yum install-y openssh: Installing an SSH Package

Yum List installed OpenSSH: Whether the query is installed OpenSSH

Configure login without password

1. switch from root user to Hadoop user

2. Create an. 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's a public key and a private key.

6. Put the public key into the Linux authentication

CP Id_rsa.pub Authorized_keys

7. LS View directory contains an authentication file Authorized_keys

8. View specific Content

VI Authorized_keys

9. Exit to the root directory. SSH authorization

chmod. SSH (r:4 w:2 x:1)

chmod. ssh/*

10. Test ssh with SSH host name

SSH Cjqlinux

Configuring sudo

1. Visudo into the edit page

2. Find root all = (all) All this line and copy the row

3. Change the root user name to another user name to configure

4.: x Save and exit

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Big Data Environment Build--ssh No password login