python学习day9

 1 [root@wwww ~]# ssh-keygen -t rsa -b 4096
 2 #-t 指定生成密钥的算法 -b指定密钥的位数
 3 Generating public/private rsa key pair.
 4 Enter file in which to save the key (/root/.ssh/id_rsa):
 5 #询问生成的密钥放在的位置,默认放在家目录下的.ssh目录
 6 Enter passphrase (empty for no passphrase):
 7 #询问是否对私钥再进行加密
 8 Enter same passphrase again:
 9 Your identification has been saved in /root/.ssh/id_rsa.
10 Your public key has been saved in /root/.ssh/id_rsa.pub.
11 The key fingerprint is:
12 e7:60:45:fe:d8:09:24:c1:1e:ef:35:cc:c1:c3:24:e4 root@wwww.axhu.com
13 #生成的指纹信息

 1 [root@wwww ~]# scp ~/.ssh/id_rsa.pub root@192.168.157.132:~/
 2 The authenticity of host ‘192.168.157.132 (192.168.157.132)‘ can‘t be established.
 3 RSA key fingerprint is 6e:0f:f8:f8:c7:c2:11:e6:4d:99:aa:16:6a:81:4a:02.
 4 Are you sure you want to continue connecting (yes/no)? yes
 5 Warning: Permanently added ‘192.168.157.132‘ (RSA) to the list of known hosts.
 6 root@192.168.157.132‘s password:
 7 id_rsa.pub                                                                                   100%  740     0.7KB/s   00:00
 8 然后远程连接到远程主机进行设置:
 9 [root@wwww ~]# ssh root@192.168.157.132
10 root@192.168.157.132‘s password:
11 Last login: Sat Jan 18 21:16:49 2014 from 192.168.157.128
12 [root@bogon ~]# mkdir .ssh
13 #这个目录默认不存在，但是这太机子若连接过其他服务器就会自动生成.ssh目录用来保存known_hosts文件
14 [root@bogon ~]# chmod 700 .ssh
15 #这个权限很重要，设置不对的话是没法通过验证
16 [root@bogon ~]# cat id_rsa.pub >> ~/.ssh/authorized_keys
17 #这里最好每次都是以>>追加的形式输出,不然会覆盖其他主机的公钥
18 [root@bogon ~]# chmod 600 ~/.ssh/authorized_keys
19 #修改权限放在其他用户修改查看

 1 import paramiko
 2 
 3 private_key = paramiko.RSAKey.from_private_key_file(‘id_rsa‘)
 4 # 创建SSH对象
 5 ssh = paramiko.SSHClient()
 6 # 允许连接不在know_hosts文件中的主机
 7 ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
 8 # 连接服务器
 9 ssh.connect(hostname=‘192.168.202.128‘, port=22, username=‘root‘, pkey=private_key)
10 
11 # 执行命令
12 stdin, stdout, stderr = ssh.exec_command(‘df‘)
13 result = stdout.read()
14 print(result.decode())
15 stdin, stdout2, stderr = ssh.exec_command(‘ifconfig‘)
16 # 获取命令结果
17 result2 = stdout2.read()
18 print(result2.decode())
19 
20 # 关闭连接
21 ssh.close()