SSH password-free login configuration in CentOS

SSH password-free login configuration in CentOS

When we installed Hadoop in CentOS, we had to configure SSH password-free login configuration. Many methods have been collected on the Internet, which cannot be solved. I started to log on with a common user and the configuration failed multiple times. Later I changed my identity as root, just a moment! In the past, the configuration in Ubuntu was successful for common users. Why can't it work after Centos?

Later, a friend reminded me that it was probably a permission issue. Centos6.0 has enabled SElinux and has strict permission requirements on network services. I tried to disable SElinux and reconfigure it to solve the problem. The configuration method is as follows.

First switch to the root identity and disable SElinux:

[Root @ bogon ~] # Vi/etc/selinux/config

Set SELINUX = disabled

Then restart.

Log on as a common user and enter the following command:

Ssh-keygen-t dsa

Press enter, and then:

Cd ~ /. Ssh

Cat id_dsa.pub> authorized_keys

Test: ssh localhost

###