用python來ssh遠端登入，如果用os.system('commod')，結果就是人機互動，跟不用也沒啥區別。

百度發現，可以用pexpect模組來實現自動互動。

# python3
import pexpect

def ssh_cmd(ip, passwd):
    #a = os.system('ssh ' +s)
    ssh = pexpect.spawn('ssh [email protected]%s'%ip)
    try:
        i = ssh.expect(['password:','continue connecting (yes/no)?'], timeout=2)
        if i ==0:
            ssh.sendline(passwd)
        elif i ==1:
            ssh.sendline('yes\n')
            ssh.expect('password: ')
            ssh.sendline(passwd)
        ret = 0
    except pexpect.EOF:
        print ("EOF")
        ssh.close()
        ret = -1
    except pexpect.TIMEOUT:
        print ("TIMEOUT")
        ssh.close()
        ret = -2
    return ret

#ssh 192.168.9.2-192.168.0.10的9臺機器
for i in range(2,11):
    ip = '192.168.0.'+str(i)
    passwd = 'password'#密碼
    num= ssh_cmd(ip,passwd)
    print (num)