1 [bigdata@localhost ~]$ chmod 700 .ssh 2 [bigdata@localhost ~]$ cd .ssh/ 3 [bigdata@localhost .ssh]$ ssh-keygen -t rsa 4 Generating public/private rsa key pair. 5 一路回车 6 Enter file in which to save the key (/home/bigdata/.ssh/id_rsa): 7 Enter passphrase (empty for no passphrase): 8 Enter same passphrase again: 9 Your identification has been saved in /home/bigdata/.ssh/id_rsa. 10 Your public key has been saved in /home/bigdata/.ssh/id_rsa.pub. 11 The key fingerprint is: 12 51:c6:8b:54:45:09:cf:47:c0:89:0a:80:44:73:2e:df bigdata@localhost.localdomain 13 The key's randomart image is: 14 +--[ RSA 2048]----+ 15 | o+.o. o=*++. | 16 | .+ . .ooo+. | 17 | . . o.o .o . | 18 | o . o.. . | 19 | . E S | 20 | | 21 | | 22 | | 23 | | 24 +-----------------+ 25 [bigdata@localhost .ssh]$ ls -l 26 total 8 27 -rw-------. 1 bigdata bigdata 1675 Jan 24 15:54 id_rsa 28 -rw-r--r--. 1 bigdata bigdata 411 Jan 24 15:54 id_rsa.pub 29 [bigdata@localhost .ssh]$ cp id_rsa.pub authorized_keys 30 [bigdata@localhost .ssh]$ chmod 644 authorized_keys 31 [bigdata@localhost ~]$ ssh localhost 32 Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.13.0-36-generic x86_64) 33 34 * Documentation: https://help.ubuntu.com 35 * Management: https://landscape.canonical.com 36 * Support: https://ubuntu.com/advantage 37 38 $vi /etc/ssh/sshd_config 39 RSAAuthentication yes # 启用 RSA 认证 40 PubkeyAuthentication yes # 启用公钥私钥配对认证方式 41 AuthorizedKeysFile .ssh/authorized_keys # 公钥文件路径（和上面生成的文件同） 42 43 service sshd restart 44