python ssh之paramiko模块使用

1.安装:

sudo pip install paramiko

2.连接到linux服务器

方法一:

#paramiko.util.log_to_file('ssh.log') #写日志文件

client = paramiko.SSHClient()

client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) #允许连接不在~/.ssh/known_hosts文件中的主机

client.connect('ip',22, 'username','password')  #指定ip地址,端口,用户名和密码进行连接

方法二:

transport = paramiko.Transport(('ip', port)) #获取连接

transport.connect(username='username',password='password')

ssh = paramiko.SSHClient()

ssh._transport = transport

3.用transport实现上传下载以及命令的执行

# coding=utf-8

import paramiko

class SSHConnection(object):

    def __init__(self, host, port, username, password):

        self._host = host

        self._port = port

        self._username = username

        self._password = password

        self._transport = None

        self._sftp = None

        self._client = None

        self._connect()  # 建立连接

     def _connect(self):

        transport = paramiko.Transport((self._host, self._port))

        transport.connect(username=self._username, password=self._password)

        self._transport = transport

    #下载

    def download(self, remotepath, localpath):

        if self._sftp is None:

            self._sftp = paramiko.SFTPClient.from_transport(self._transport)

        self._sftp.get(remotepath, localpath)

    #上传

    def put(self, localpath, remotepath):

        if self._sftp is None:

            self._sftp = paramiko.SFTPClient.from_transport(self._transport)

        self._sftp.put(localpath, remotepath)

    #执行命令

    def exec_command(self, command):

        if self._client is None:

            self._client = paramiko.SSHClient()

            self._client._transport = self._transport

        stdin, stdout, stderr = self._client.exec_command(command)

        data = stdout.read()

        if len(data) > 0:

            print data.strip()   #打印正确结果

            return data

        err = stderr.read()

        if len(err) > 0:

            print err.strip()    #输出错误结果

            return err

    def close(self):

        if self._transport:

            self._transport.close()

        if self._client:

            self._client.close()

if __name__ == "__main__":

    conn = SSHConnection('192.168.87.200', 22, 'username', 'password')

    localpath = 'hello.txt'

    remotepath = '/home/hupeng/WorkSpace/Python/test/hello.txt'

    print 'downlaod start'

    conn.download(remotepath, localpath)

    print 'download end'

    print 'put begin'

    conn.put(localpath, remotepath)

    print 'put end'

    conn.exec_command('whoami')

    conn.exec_command('cd WorkSpace/Python/test;pwd')  #cd需要特别处理

    conn.exec_command('pwd')

    conn.exec_command('tree WorkSpace/Python/test')

    conn.exec_command('ls -l')

    conn.exec_command('echo "hello python" > python.txt')

    conn.exec_command('ls hello')  #显示错误信息

    conn.close()