配置Linux 免密码登陆

配置Linux 免密码登陆

1 生成秘钥对，一路回车就好

[root@localhost ~]# ssh-keygen Generating public/private rsa key pair.Enter file in which to save the key (/root/.ssh/id_rsa): Created directory '/root/.ssh'.Enter passphrase (empty for no passphrase): Enter same passphrase again: 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:92:98:a4:6d:a3:bf:04:67:f5:5f:d9:e2:9f:e1:b8:c1 root@localhost.localdomainThe key's randomart image is:+--[ RSA 2048]----+|                 ||                 ||    . .          ||   + + o     o   ||  o O o S   + .  ||   * . . . + .   ||  . .     . E .  ||   o         = o ||    o.      o.+  |+-----------------+[root@localhost ~]#

２ 修改公钥名称为authorized_keys

[root@localhost .ssh]# cd /root/.ssh/[root@localhost .ssh]# cat id_rsa.pub >authorized_keys

3 修改权限为600

[root@localhost .ssh]# chmod 600 authorized_keys

4 修改sshd配置文件

[root@localhost .ssh]# vi /etc/ssh/sshd_config RSAAuthentication yesPubkeyAuthentication yesAuthorizedKeysFile      .ssh/authorized_keysPasswordAuthentication no

5 重启sshd服务

[root@localhost .ssh]# service sshd restartStopping sshd:                                             [  OK  ]Starting sshd:                                             [  OK  ][root@localhost .ssh]#