python中ssh2怎么远程登录节点并执行命令

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root@node7:/opt# vim pyssh3.py#!/usr/bin/python"""SSH connect to remote machines and then execute what you need command"""import paramiko # import paramiko && help(paramiko) || pydoc paramikoimport threading#debug = True#class SSHClass(objiect):#    "class"def pyssh3(ip, username, passwd, cmd):    try:        ssh = paramiko.SSHClient()        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())        ssh.connect(ip, 22, username, passwd, timeout=5)        for m in cmd:            stdin, stdout, stderr = ssh.exec_command(m)#            stdin.write("Y")   #simple interaction, default input 'Y'            out = stdout.readlines()            #output to screen                 for o in out:                print o,            print '%s\tOK\n' % (ip),            ssh.close()    except Exception, e:        print 'ERR: can not find remote host %s' % (ip), eif __name__=='__main__':    cmd = ['hostname']#need to execute cmd    username = "root"#username    passwd = "123123"    #password    threads = []   #multi thread    print "Prompt:begin to connect remote machines......"    for i in range(150,156):          ip = '10.100.1.'+str(i)          a=threading.Thread(target=pyssh3,args=(ip,username,passwd,cmd)) #used default arguments#          __init__(self, group=None, target=None, name=None, args=(), kwargs=None, verbose=None)#          a=threading.Thread()#          a.__init__(group=None, target=pyssh, name=None, args=(ip,username,passwd,cmd),#                 kwargs=None, verbose=None)          a.start()

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