# paramiko包

paramiko是一个用于做远程控制的模块，使用该模块可以对远程服务器进行命令或文件操作，值得一说的是，fabric和ansible内部的远程管理就是使用的paramiko来现实。

## 安装

```bash
pip install pycrypto
pip install paramiko
#paramiko模块内部依赖pycrypto
#注意阿里源出现错误就到官方Pypi源中下载

#直接下载(推荐)
pip install paramiko.whl
```



## 基本使用

```python
import paramiko

# 创建SSH对象
ssh = paramiko.SSHClient()
# 允许连接不在known_hosts文件上的主机
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
# 连接服务器
ssh.connect(hostname="192.168.0.99", port=22, username="root", password="rootroot")
# 执行命令
stdin, stdout, stderr = ssh.exec_command('df')
# 获取结果
result = stdout.read().decode()
# 获取错误提示（stdout、stderr只会输出其中一个）
err = stderr.read()
# 关闭连接
ssh.close()
print(stdin, result, err)
```

注：如果注释“ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())”这句，会报错。类似问题可以为linux系统中~/.ssh/known_hosts文件中的内容。

## SFTP功能

```python
import paramiko
# 连接虚拟机centos上的ip及端口
transport = paramiko.Transport(("192.168.0.99", 22))
transport.connect(username="root", password="rootroot")
# 将实例化的Transport作为参数传入SFTPClient中
sftp = paramiko.SFTPClient.from_transport(transport)
# 将“calculator.py”上传到filelist文件夹中
sftp.put('D:\python库\Python_shell\day05\calculator.py', '/filelist/calculator.py')
# 将centos中的aaa.txt文件下载到桌面
sftp.get('/filedir/aaa.txt', r'C:\Users\duany_000\Desktop\test_aaa.txt')
transport.close()
```

## 使用密钥实现SSH功能

```python
import paramiko
private_key = paramiko.RSAKey.from_private_key_file('id_rsa31')
# 创建SSH对象
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
# 连接服务器
ssh.connect(hostname='192.168.79.9', port=22, username='root', pkey=private_key)
stdin, stdout, stderr = ssh.exec_command('ifconfig')
res_out = stdout.read()
print(res_out.decode())
ssh.close()
```

## 使用密钥实现SFTP功能

```python
import paramiko
private_key = paramiko.RSAKey.from_private_key_file('id_rsa31')
# 连接虚拟机centos上的ip及端口
transport = paramiko.Transport(("192.168.79.9", 22))
transport.connect(username="root", pkey=private_key)
# 将实例化的Transport作为参数传入SFTPClient中
sftp = paramiko.SFTPClient.from_transport(transport)
# 将“calculator.py”上传到filelist文件夹中
sftp.put('D:\python库\Python_shell\day05\calculator.py', '/filedir/calculator.py')
# 将centos中的aaa.txt文件下载到桌面
sftp.get('/filedir/oldtext.txt', r'C:\Users\duany_000\Desktop\oldtext.txt')
transport.close()
```


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