cron执行，但是没有结果？

amonest

我使用crontab -e命令增加了两项排程：

1. 59 15 * * * tar zcvf /var/backups/home.tar.gz /home/amonest/python
   
2. 59 15 * * * tar zcvf /home/amonest/backup.tar.gz /home/amonest/python
   

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备份到/home/amonest目录成功了，备份到/var/backups失败了。

/var/log/cron.log记录到了有执行这两项：

1. Jun 19 15:59:02 amonest-virtual-machine CRON[5328]: (amonest) CMD (tar zcvf /home/amonest/backup.tar.gz /home/amonest/python)
   
2. Jun 19 15:59:02 amonest-virtual-machine CRON[5329]: (amonest) CMD (tar zcvf /var/backups/home.tar.gz /home/amonest/python)
   

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是权限问题导致备份/var/backups不成功吗？cron进程不是以root身份运行的吗？

taojie2000

回复 1# amonest


    cron进程不是以root身份运行的吗

    该crontab 任务不再root列表下! 任务里的命令执行权限是普通用户的!

taojie2000

crontab  -l   

amonest

1. # Edit this file to introduce tasks to be run by cron.
   
2. #
   
3. # Each task to run has to be defined through a single line
   
4. # indicating with different fields when the task will be run
   
5. # and what command to run for the task
   
6. #
   
7. # To define the time you can provide concrete values for
   
8. # minute (m), hour (h), day of month (dom), month (mon),
   
9. # and day of week (dow) or use '*' in these fields (for 'any').#
   
10. # Notice that tasks will be started based on the cron's system
    
11. # daemon's notion of time and timezones.
    
12. #
    
13. # Output of the crontab jobs (including errors) is sent through
    
14. # email to the user the crontab file belongs to (unless redirected).
    
15. #
    
16. # For example, you can run a backup of all your user accounts
    
17. # at 5 a.m every week with:
    
18. # 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
    
19. #
    
20. # For more information see the manual pages of crontab(5) and cron(8)
    
21. #
    
22. # m h  dom mon dow   command
    
23. 
    
24. 12 16 * * * tar zcvf /var/backups/home.tar.gz /home/amonest/python
    
25. 12 16 * * * tar zcvf /home/amonest/backup.tar.gz /home/amonest/python
    

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amonest

回复 2# taojie2000

能修改成root吗？


   

taojie2000

回复 5# amonest


    你会用 命令切换到root 用户不

    然后root用户下添加

amonest

sudo crontab -u root -e?

taojie2000 发表于 2012-06-19 17:11
回复 5# amonest

Shell_HAT

su - root
crontab -e

snow888

或者也可以直接将 /var/backups 目录权限改成你当前用户可读写的权限。

ccxxx

權限問題,可用以下方法確認
另外,一般用户都可以設定cron

12 16 * * * tar zcvf /var/backups/home.tar.gz /home/amonest/python > /tmp/varbackup.log 2>&1