I want to get the details of the last run cron job. If the job is interrupted due to some internal problems, I want to re-run the cron job.
我想知道上次cron工作的细节。如果工作因为一些内部问题而中断，我想重新运行cron作业。
Note: I don't have superuser privilege.
注意:我没有超级用户特权。
2 个解决方案
#1
58
You can see the date, time, user and command of previously executed cron jobs using:
您可以使用以下命令查看以前执行的cron作业的日期、时间、用户和命令:
grep CRON /var/log/syslog
This will show all cron jobs. If you only wanted to see jobs run by a certain user, you would use something like this:
这将显示所有的cron工作。如果您只想看到某个用户运行的作业，您可以使用以下内容:
grep CRON.*\(root\) /var/log/syslog
Note that cron logs at the start of a job so you may want to have lengthy jobs keep their own completion logs; if the system went down halfway through a job, it would still be in the log!
请注意，cron日志记录在作业开始时，因此您可能希望有冗长的作业保存自己的完成日志;如果系统在一份工作中半途而废，它仍然会在日志中!
Edit: If you don't have root access, you will have to keep your own job logs. This can be done simply by tacking the following onto the end of your job command:
编辑:如果您没有根访问，您将不得不保留您自己的工作日志。这可以简单地通过在你的工作命令的末尾加上以下内容来完成:
&& date > /home/user/last_completed
The file /home/user/last_completed would always contain the last date and time the job completed. You would use >> instead of > if you wanted to append completion dates to the file.
文件/home/user/last_completed总是包含作业完成的最后日期和时间。如果您希望在文件中附加完成日期，您将使用>>而不是>。
You could also achieve the same by putting your command in a small bash or sh script and have cron execute that file.
您也可以通过将命令放在一个小bash或sh脚本中并让cron执行该文件来实现这一点。
#!/bin/bash
[command]
date > /home/user/last_completed
The crontab for this would be:
为此，crontab将是:
* * * * * bash /path/to/script.bash
#2
10
/var/log/cron contains cron job logs. But you need a root privilege to see.
/var/log/cron包含cron作业日志。但您需要root权限才能查看。
#1
58
You can see the date, time, user and command of previously executed cron jobs using:
您可以使用以下命令查看以前执行的cron作业的日期、时间、用户和命令:
grep CRON /var/log/syslog
This will show all cron jobs. If you only wanted to see jobs run by a certain user, you would use something like this:
这将显示所有的cron工作。如果您只想看到某个用户运行的作业，您可以使用以下内容:
grep CRON.*\(root\) /var/log/syslog
Note that cron logs at the start of a job so you may want to have lengthy jobs keep their own completion logs; if the system went down halfway through a job, it would still be in the log!
请注意，cron日志记录在作业开始时，因此您可能希望有冗长的作业保存自己的完成日志;如果系统在一份工作中半途而废，它仍然会在日志中!
Edit: If you don't have root access, you will have to keep your own job logs. This can be done simply by tacking the following onto the end of your job command:
编辑:如果您没有根访问，您将不得不保留您自己的工作日志。这可以简单地通过在你的工作命令的末尾加上以下内容来完成:
&& date > /home/user/last_completed
The file /home/user/last_completed would always contain the last date and time the job completed. You would use >> instead of > if you wanted to append completion dates to the file.
文件/home/user/last_completed总是包含作业完成的最后日期和时间。如果您希望在文件中附加完成日期，您将使用>>而不是>。
You could also achieve the same by putting your command in a small bash or sh script and have cron execute that file.
您也可以通过将命令放在一个小bash或sh脚本中并让cron执行该文件来实现这一点。
#!/bin/bash
[command]
date > /home/user/last_completed
The crontab for this would be:
为此，crontab将是:
* * * * * bash /path/to/script.bash
#2
10
/var/log/cron contains cron job logs. But you need a root privilege to see.
/var/log/cron包含cron作业日志。但您需要root权限才能查看。