paramiko模块学习

import paramiko
import psutil


def bytes2human(n):
    """
    字节转化成相应容量值
    :param n: 字节数
    :return:
    """
    # 容量单位
    symbols = ('K','M','G','T')
    prefix = {}
    for i, s in enumerate(symbols):
        prefix[s] = 1 << ( i + 1 ) * 10
    # prefix = {'K': 1024, 'M': 1048576, 'G': 1073741824, 'T': 1099511627776}
    for s in reversed(symbols):
        if n >= prefix[s]:
            value = float(n) / prefix[s]
            return '%.1f%s' % (value,s)
    return '%sB' % n

class Conn:
    def __init__(self, ip, username, password, port=22):
        self.ip = ip
        self.port = port
        self.username = username
        self.password = password

    def ssh_conn(self):
        ssh = paramiko.SSHClient()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy)
        ssh.connect(self.ip, self.port, self.username, self.password)
        return ssh




def check_file(ip, port, username, password):
    """
    远程执行命令查看服务器的文件系统使用情况
    在linux系统下可以免密，利用秘钥登录
    :param ip: 目标机器IP
    :param port: 端口号
    :param username: 用户名
    :param password: 密码
    :return:
    """
    ssh = paramiko.SSHClient()
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy)
    ssh.connect(ip, port, username, password)
    _, out, _ = ssh.exec_command('df -h;df -i')
    ret = out.readlines()
    # print(ret)
    for line in ret:
        if '文件系统' not in line:
            line = line.strip().split()
            file_num = int(line[4].replace('%', ' '))
            file_system = line[5]
            # print(file_num,file_system)
            if file_num > 60:
                print(file_num, file_system)

    ssh.close()


def check_file1(ip, username, password):
    conn1 = Conn(ip, username, password)
    ssh = conn1.ssh_conn()
    _, out, _ = ssh.exec_command('df -h;df -i')
    ret = out.readlines()
    for line in ret:
        if '文件系统' not in line:
            line = line.strip().split()
            file_num = int(line[4].replace('%', ' '))
            file_system = line[5]
            if file_num > 60:
                print(file_num, file_system)
    ssh.close()


def check_mem(ip,username,password):
    conn = Conn(ip=ip,username=username,password=password)
    ssh = conn.ssh_conn()


if __name__ == '__main__':
    
    ret = bytes2human(1024)
    print(ret)

def check_file(ip,port,username,password):
    """
    远程执行命令查看服务器的文件系统使用情况
    在linux系统下可以免密，利用秘钥登录
    :param ip: 目标机器IP
    :param port: 端口号
    :param username: 用户名
    :param password: 密码
    :return:
    """
    ssh = paramiko.SSHClient()
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy)
    ssh.connect(ip,port,username,password)
    _, out, _ = ssh.exec_command('df -h;df -i')
    ret = out.readlines()
    # print(ret)
    for line in ret:
        if '文件系统' not in line:
            line = line.strip().split()
            file_num = int(line[4].replace('%', ' '))
            file_system = line[5]
            # print(file_num,file_system)
            if file_num > 60:
                print(file_num, file_system)
    ssh.close()