cron作业不会输出到nohup.out [英] cron job doesn't output to nohup.out

问题描述

我有一个 start.sh bash脚本，通过 CRON JOB 在ubuntu服务器上运行

start.sh 包含 start.sh 的代码

路径 / home /ubuntu/folder1/folder2/start.sh

 ＃！/ bin / bash 
 
 crawlers（）{
 nohup scrapy crawl first& 
 nohup scrapy crawl 2& 
 wait $！ 
 nohup scrapy crawl 3& 
 nohup scrapy crawl 4& 
 wait 
} 
 
 cd / home / ubuntu / folder1 / folder2 / 
 PATH = $ PATH：/ usr / local / bin 
 export PATH 
 
 python init.py& 
 wait $！ 
 crawlers 
 python final.py 
  

我的问题是如果我运行 start.sh 我自己在命令行上输出 nohup.out 文件

，但执行此通过 cronjob （虽然脚本运行正常），但不生成 nohup.out

<如何在 nohup.out 中获得此cronjob的输出？

解决方案

p>为什么要使用 nohup ？ nohup 是一个命令，通知运行终端忽略挂断信号。 cron ，但没有挂机信号，因为它没有链接到终端会话。

，而不是：

  nohup scrapy第一& 
  

您可能想要：

  scrapy crawl first> first.txt& 
  

最后一个例子也适用于终端，但是当你关闭终端时， code> hup ），结束程序。

i have start.sh bash script that is running though CRON JOB on ubuntu server

start.sh contains bellow mentioned lines of code

path of start.sh is /home/ubuntu/folder1/folder2/start.sh

#!/bin/bash

crawlers(){
    nohup scrapy crawl first &
    nohup scrapy crawl 2nd &
    wait $!
    nohup scrapy crawl 3rd &
    nohup scrapy crawl 4th &
    wait
}

cd /home/ubuntu/folder1/folder2/
PATH=$PATH:/usr/local/bin
export PATH

python init.py &
wait $!
crawlers
python final.py

my issue is if i run start.sh my myself on command line it outputs in nohup.out file

but when it executes this bash file through cronjob (although scripts are running fine) its not producing nohup.out

how can i get output of this cronjob in nohup.out ?

解决方案

Why are you using nohup? nohup is a command that tells the running terminal to ignore the hangup signal. cron, however, has no hangup signal, because it is not linked to a terminal session.

In this case, instead of:

nohup scrapy crawl first &

You probably want:

scrapy crawl first > first.txt &

The last example also works in a terminal, but when you close the terminal, the hangup signal (hup) is sent, which ends the program.

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