Use SSH-keygen to remotely log on to the host without a password

SSH use ssh-keygen to remotely log on to the host without entering the password environment: local host name: ha01eth0: 192.168.1.100 // external IP address www.2cto.com remote host name: ha02eth0: 192.168.1.200 // external IP address local host ha01 Configuration: [root @ ha01/] # cd/etc/ssh [root @ ha01 ssh] # ssh-keygen-t rsa-N "" (This step generates a key public/private key pair, -N "" indicates that the key pair phrase is empty.) Generating public/private rsa key pair. enter file in which to save the key (/root /. ssh/id_rsa): Your identification has been saved in/root /. ssh/id_rsa.Your public key has been saved in/root /. ssh/id_rsa.pub.The key fingerprint is: 82: 2c: 74: 43: 8e: 16: f4: ef: ac: 91: 0f: d7: 6f: a6: f3: 59 root @ ha01 copy the public key to the remote host: www.2cto.com if the ha02 server/root /. the ssh/authorized_keys file does not exist [root @ ha01 ssh] # scp/root /. ssh/id_rsa.pub root@192.168.1.200:/root /. ssh/authorized_keys if the authorized_keys file exists in ha01, run: [root @ ha01 ssh] # scp/root /. ssh/id_rsa.pub root@192.168.1.200:/root /. run [root @ ha02/] # cat/root /. ssh/id_rsa.pub>/root /. ssh/authorized_keys SSH logon test: [root @ ha01 ssh] # ssh ha02Last login: Fri Apr 8 10:41:28 2011 from ha01