python 实用脚本

1.用python实现一个查看某网段所有主机的状态（3秒实现）

#vim ping.py

import subprocess
import threading

def ping(host):
    result = subprocess.call(
        'ping -c2 %s &> /dev/null' % host,
        shell=True
    )
    if result == 0:
        print "%s:up" % host
    else:
        print "%s:down" % host

if __name__ == '__main__':
    ips = ['172.40.55.%s' % i for i in range(1, 255)]
    for ip in ips:
        t = threading.Thread(target=ping, args=(ip,))
        t.start()

[root@room1pc01 桌面]# Python mtping.py
172.40.55.1:up
172.40.55.66:up
172.40.55.6:down
172.40.55.114:up
172.40.55.2:down
172.40.55.3:down
172.40.55.115:up

。。。。。

2.利用ssh实现多线程并发访问(可以同时创建删除，该密码等）

[root@room1pc01 ～]# yum install -y python-paramiko

#vim allhost.py

import getpass
import os
import paramiko
import sys
import threading

def remote_comm(host, passwd, comm, user='root'):
    ssh = paramiko.SSHClient()
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    ssh.connect(host, username=user, passWord=passwd)
    stdin, stdout, stderr = ssh.exec_command(comm)
    out = stdout.read()
    err = stderr.read()
    if out:
        print '[out]%s:\n%s' % (host, out),
    if err:
        print '[error]%s:\n%s' % (host, err),
    ssh.close()

if __name__ == '__main__':
    if len(sys.argv) != 3:
        print "Usage: %s ipfile 'command'" % sys.argv[0]
        sys.exit(1)
    if not os.path.isfile(sys.argv[1]):
        print "No such file:", sys.argv[1]
        sys.exit(2)

    ipfile = sys.argv[1]
    command = sys.argv[2]
    pwd = getpass.getpass()

    with open(ipfile) as fobj:
        for line in fobj:
            ip = line.strip()
            t = threading.Thread(target=remote_comm, args=(ip, pwd, command))
            t.start()

#vim ipaddr.txt

192.168.4.1
192.168.4.2
192.168.4.3
192.168.4.4

[root@room1pc01 桌面]# python remote_comm.py ipaddr.txt tedu.cn 'useradd bob'