如何在AWS EC2服务器中编写cron作业

I've created a cron job in AWS EC2 but it is not working.

我在AWS EC2中创建了一个cron作业，但它无法正常工作。

I followed below steps to create cron tab:

我按照以下步骤创建了cron选项卡：

Step 1: I logged in to AWS EC2 Instace
第1步：我登录AWS EC2 Instace
step 2: crontab -e
第2步：crontab -e
Step 3: Insert mode
第3步：插入模式
Step 4: I entered * * * * * php/var/www/html/welcome.php (To run every min.)
第4步：我输入* * * * * php / var / www / html / welcome.php（每分钟运行一次）
Step 5: :wq
第五步：wq

Cron tab is created but not running.

Cron选项卡已创建但未运行。

Please can you any one help me if is there any PHP script means please provide me. Do I need to give spaces between every star?

如果有任何PHP脚本意味着请提供给我，请帮助我。我是否需要在每颗恒星之间留出空间？

3 个解决方案

#1

First of all, you need to put an space between php and /var:

首先，你需要在php和/ var之间放一个空格：

From

从

* * * * * php/var/www/html/welcome.php

至

* * * * * php /var/www/html/welcome.php
             ^

Then, you'd better use /bin/php instead of just php. To determine where the php executable is located, type which php in your console, it will give you the file path. So it will become something like this:

然后，你最好使用/ bin / php而不仅仅是php。要确定php可执行文件的位置，在控制台中键入哪个php，它将为您提供文件路径。所以它会变成这样的：

* * * * * /bin/php /var/www/html/welcome.php
          ^^^^^^^^

More things:

更多的东西：

check if crontab is saved properly? Type crontab -l. Your new crontab line should be there.
检查crontab是否正确保存？输入crontab -l。你的新crontab行应该在那里。
is the script exactly in this dir? Try ls -l /var/www/html/welcome.php.
是这个目录中的脚本吗？试试ls -l /var/www/html/welcome.php。
is the script executing if you do from console? Try /bin/php var/www/html/welcome.php to see if it is a script or crontab problem.
如果你从控制台执行脚本是执行？尝试/ bin / php var / www / html / welcome.php查看它是否是脚本或crontab问题。
does the script have executing mode? Try chmod 755 /var/www/html/welcome.php
脚本有执行模式吗？试试chmod 755 /var/www/html/welcome.php

Keep us updated so we can find what can be causing the error.

让我们更新，以便我们可以找到可能导致错误的原因。

#2

Running cron on EC2 is not any different from running on any *nix server - as far as I know. I would check of the system messages for any errors. You can also redirect stderr/stdout to a file as in

在EC2上运行cron与在任何* nix服务器上运行没有任何不同 - 据我所知。我会检查系统消息是否有任何错误。您还可以将stderr / stdout重定向到文件中

 * * * * * <your script>  >> /var/tmp/out.log 2>&1

and check for any issues for starters.

并检查初学者的任何问题。

#3

May be a too late but anyways if you intend to run the script every minute the command should probably be

可能为时已晚，但如果您打算每隔一分钟运行该命令，那么该命令可能应该是

* * * * * php /var/www/html/welcome.php

#1