一：使用 paramiko 进行SSH连接

首先确保已安装paramiko库：pip install paramiko
代码示例

在这里插入代码片import paramiko

hostname = 'hostname'
username = 'user'
password = 'passwd'

client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(hostname, username=username, password=password)

stdin, stdout, stderr = client.exec_command('ls')
for line in stdout:
    print(line.strip('\n'))
    
client.close()

二：使用 smtplib 发送邮件到SMTP服务器

代码示例

import smtplib
from email.mime.text import MIMEText
from email.header import Header

# 邮件发送者和接收者
sender = 'from@example.com'
receivers = ['to@example.com']

# 邮件内容
message = MIMEText('Python 邮件发送测试...', 'plain', 'utf-8')
message['From'] = Header("Python教程", 'utf-8')
message['To'] =  Header("测试", 'utf-8')
message['Subject'] = Header('Python SMTP 邮件测试', 'utf-8')

try:
    smtpObj = smtplib.SMTP('localhost')
    smtpObj.sendmail(sender, receivers, message.as_string())    
    print("邮件发送成功")
except smtplib.SMTPException as e:
    print("Error: 无法发送邮件", e)

三：上传文件到服务器

import paramiko

def upload_file_to_server(hostname, port, username, password, local_file_path, remote_file_path):
    try:
        client = paramiko.SSHClient()
        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        client.connect(hostname, port=port, username=username, password=password)

        ftp_client = client.open_sftp()
        ftp_client.put(local_file_path, remote_file_path)
        ftp_client.close()

        client.close()
        print("文件上传成功")
    except Exception as e:
        print(f"文件上传失败: {str(e)}")

# 示例
upload_file_to_server('hostname', 22, 'username', 'password', '/path/to/local/file', '/path/to/remote/file')

四：从服务器下载文件

代码示例

import paramiko

def download_file_from_server(hostname, port, username, password, remote_file_path, local_file_path):
    try:
        client = paramiko.SSHClient()
        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        client.connect(hostname, port=port, username=username, password=password)

        ftp_client = client.open_sftp()
        ftp_client.get(remote_file_path, local_file_path)
        ftp_client.close()

        client.close()
        print("文件下载成功")
    except Exception as e:
        print(f"文件下载失败: {str(e)}")

# 示例
download_file_from_server('hostname', 22, 'username', 'password', '/path/to/remote/file', '/path/to/local/file')

五：在服务器上执行命令

import paramiko

def execute_command_on_server(hostname, port, username, password, command):
    try:
        client = paramiko.SSHClient()
        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        client.connect(hostname, port=port, username=username, password=password)

        stdin, stdout, stderr = client.exec_command(command)
        print("命令输出:")
        for line in stdout:
            print(line.strip())

        client.close()
    except Exception as e:
        print(f"执行命令失败: {str(e)}")

# 示例
execute_command_on_server('hostname', 22, 'username', 'password', 'ls')

往服务器传文件时报错：

CryptographyDeprecationWarning: Blowfish has been deprecated and will be removed in a future release
  "class": algorithms.Blowfish,

解决方案：
报错文件里面 以下的代码注释掉即可