CentOS the configuration file for SSH without password login _linux

1, confirm the local sshd configuration file (requires root permissions)

$ gedit/etc/ssh/sshd_config

Find the following and remove the annotation "#"

Rsaauthentication Yes
pubkeyauthentication Yes
authorizedkeysfile. Ssh/authorized_keys

　 2, if the configuration file changes need to restart the sshd service (requires root permissions)

$/sbin/service sshd Restart

Configuring SSH Password-free logon takes 3 steps:

1. Generate public and private keys

2. Import public key to authentication file, change permissions

3. Test

1. Generate public and private keys

Shell code: SSH-KEYGEN-T RSA

Two files are generated by default in the ~/.ssh directory:

Id_rsa: Private key
Id_rsa.pub: Public Key

2. Import public key to authentication file, change permissions

2.1 Import this machine

Shell code: Cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

2.2 Importing servers for password-free logins

First copy the public key to the server

Shell code: SCP ~/.ssh/id_rsa.pub xxx@host:/home/id_rsa.pub

The public key is then imported into the authentication file (this step is done on the server)

Shell code: Cat/home/id_rsa.pub >> ~/.ssh/authorized_keys

2.3 Changing permissions on the server

Shell code: chmod ~/.ssh

chmod ~/.ssh/authorized_keys

3. Test SSH XXX

The above is a small set to introduce the CentOS SSH without password login configuration, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!