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'