SSH Authentication System Configuration Guide Instructions

SSH has an authentication system that allows SSH communication between host and host to not need to enter a password this is very useful for us, especially in remote backup

Let's take a look at the detailed content

Suppose there are now 3 servers in which

192.168.1.100 for backup Server This article is referred to as 100

192.168.1.101 for Web Server This article is referred to as 101

192.168.1.102 for Web Server This article is referred to as 102

192.168.1.103 for Web Server This article is referred to as 103

We may need authorization 100 to access 101, 102, 103

Before you can use the SCP tool, log in 100 and install openssh-clients after installation

Run Ssh-keygen after

Press ENTER 3 times

In this way, Id_rsa, and id_rsa.pub are generated under the/root/.ssh/path, where Id_rsa is the key and the id_rsa.pub is the public key

Call the SCP to copy 100 of the public key to 101, 102, 103 servers

Scp/root/.ssh/id_rsa.pub Root@192.168.1.101:/root

Scp/root/.ssh/id_rsa.pub Root@192.168.1.102:/root

Scp/root/.ssh/id_rsa.pub Root@192.168.1.103:/root

Alternatively, copy the 100 public key to 101, 102, 103 servers such as wget,

Log on to the 101, 102, and 103 servers individually to execute the following command

Install Openssh-clients

Run Ssh-keygen

Press ENTER 3 times

Rename the 100 public key and copy it to/root/.ssh/authorized_keys

You can now use SSH directly to link 101, 102, 103, or SCP remote copy files from 100 without entering a password

[note] The/ROOT/.SSH directory automatically generates an invalid manual creation for the Ssh-keygen tool