CentOS ssh password-free key login

Assume that from a host SSH login B host, with the secret key instead of the password, the steps are as follows:

1. Execute on Host A: ssh-keygen-t RSA

All by default, without entering a password, generate two files:

/root/.ssh/id_rsa

/root/.ssh/id_rsa.pub

2. Generate authorized_keys file:

Touch/root/.ssh/authorized_keys

Cat/root/.ssh/id_rsa.pub >>/root/.ssh/authorized_keys

chmod 700/root/.ssh/id_rsa

3. Copy the Authorized_keys file to Host B:

Scp/root/.ssh/authorized_keys [Email protected]:/root/.ssh/

If there is no/root/.ssh directory on Host B, log on to the B host to execute ssh-keygen-t RSA and then copy the authorized_keys file.

4. Complete

CentOS ssh password-free key login