在遠程服務器上運行命令以秒為單位查找正常運行時間

Question

這是我到目前為止的內容：

#!/usr/bin/python

import sys
import os
import subprocess
from subprocess import check_output
import time
import sh
from sh import sshpass
import re
import time, datetime
check_time = 0

with open("log.txt", "a") as f:
    while 1:
        #out = check_output(["sshpass", "-p", "pass", "ssh",
        #                    "theo@localhost", "\"/usr/bin/cat",
        #                    "/proc/uptime\""])
        #print (out)
        #out = str(out)
        uptime = sh.Command("/usr/bin/sshpass")
        result = uptime("-p", "pass", "ssh", "theo@localhost", "\"cat",
                        "/proc/uptime\"")
        result = str(result)
        print (result)
        result = result.split(' ', 1)[0]
        print (result)
        f.write(result)
        result_int = int(result)
        if result_int > check_time:
            print("it rebooted", result_int, "minutes ago")

        time.sleep(5)

結果：

checking uptime
Traceback (most recent call last):
  File "./uptime.py", line 23, in <module>
    result = uptime("-p", "pass", "ssh", "theo@localhost", "\"cat", "/proc/uptime\"")
  File "/usr/lib/python3.5/site-packages/sh.py", line 1021, in __call__
    return RunningCommand(cmd, call_args, stdin, stdout, stderr)
  File "/usr/lib/python3.5/site-packages/sh.py", line 486, in __init__
    self.wait()
  File "/usr/lib/python3.5/site-packages/sh.py", line 500, in wait
    self.handle_command_exit_code(exit_code)
  File "/usr/lib/python3.5/site-packages/sh.py", line 516, in handle_command_exit_code
    raise exc(self.ran, self.process.stdout, self.process.stderr)
sh.ErrorReturnCode_127:

  RAN: '/usr/bin/sshpass -p pass ssh theo@localhost "cat /proc/uptime"'

  STDOUT:


  STDERR:
zsh:1: no such file or directory: cat /proc/uptime

您可以看到我有兩次嘗試，一次嘗試使用sh庫，另一次嘗試使用check_output，都導致關於無法運行/usr/bin/cat /proc/uptime的相同錯誤。

但是，如您在回溯末尾所看到的：

RAN: '/usr/bin/sshpass -p pass ssh theo@localhost "cat /proc/uptime"'

這似乎是一條非常有效的行，如果我將其粘貼到終端，則可以正常工作。

有任何想法嗎？ 如果我僅輸入“正常運行時間”，該命令確實可以工作，但是比起以秒為單位的時間來編輯輸出，盡管這樣做會更容易（至少我認為是這樣）： ）

我正在使用python 3.5.2

Answer 1

根據輸出，您需要修改正常運行時間行，如下所示：

        result = uptime("-p", "pass", "ssh", "theo@localhost", "cat",
                    "/proc/uptime")

看起來“ cat / proc / uptime”在您的原始代碼中被ssh解釋為一個參數。

Answer 2

IRC上有人建議我使用command_string = "cat /proc/cpu/"並

result = uptime("-p", "pass", "ssh", "theo@localhost", command_string)

哪個有效！