Clearly, keeping Cron jobs running is important.
显然，保持运行Cron作业非常重要。
This function was controlled by cron jobs and scripts.
此功能由cron作业和脚本控制。
When Cron jobs fail to run, various problems can occur.
当Cron作业无法运行时，各种问题就随之而来。
Of these two types, system Cron jobs are the more important.
对于这两种作业而言，系统Cron作业更加重要一些。
You may also have to vary The Times at which your cron jobs run.
可能还必须修改运行cron作业的时间。
In contrast, there's an easy way to specify cron jobs to be run at later times.
相反，能够简便地指定在以后运行的cron作业。
The preceding instructions assume that Anacron will be used to run system cron jobs.
前面的步骤假设将Anacron用于运行系统cron作业。
You can delete all scheduled cron jobs using the cron command with the -r option as illustrated in Listing 10.
可以使用cron命令和- r选项删除所有调度的cron作业，见清单10。
To delete system cron or anacron jobs, edit /etc/crontab, /etc/anacrontab, or edit or delete files in the /etc/cron.d directory.
要删除系统cron或anacron 作业，应该编辑 /etc/crontab、/etc/anacrontab或者编辑或删除 /etc/cron.d 目录中的文件。
I do know that my CRON jobs are now emailing me every 15 minutes so, until I get a chance to figure out what I did wrong there …
我知道我的工作是玉米电子邮件我现在每15分钟做，直到我有机会找出我没有错有…
You should not, however, convert your hourly Cron jobs to Anacron format; Anacron isn't a suitable replacement for Cron for shorter-than-daily tasks.
但是，不应该将每小时执行一次的Cron 作业转换为Anacron形式；对于间隔时间短于一天的作业，Anacron并不适合替代 Cron。
Ordinarily, Anacron handles system tasks, but you can also use it to handle the equivalent of user cron jobs too, so you may want to configure it to run both types of jobs.
通常来讲，Anacron将处理系统作业，但是您还可以使用它处理相当于用户cron作业的内容，因此您可能需要配置它来同时运行这两种类型的作业。
For this reason, Anacron is best employed on systems that really need it, such as laptops and desktops that are usually powered down overnight, when cron jobs typically run.
鉴于这个原因，最好将Anacron应用于真正需要它的系统，比如经常在夜晚关机的笔记本电脑和台式机，而cron作业通常在夜晚运行。
The reason that cron processes can't communicate with ssh-agent is that cron jobs are executed as child processes by cron and thus do not inherit the $SSH_AUTH_SOCK shell variable.
cron进程不能与ssh-agent通信的原因是，cron作业是作为 cron 的子进程来执行，这样它们就不会继承 $SSH_AUTH_SOCK。
Any issues with processes not starting properly may need to be addressed in the startup scripts of your primary environment. In particular, you must evaluate the cron jobs individually.
进程没有正常启动的问题可能需要在主环境的启动脚本中解决。
Normally, you run commands with the cron and at facilities at some point when you may not be around, so the usual assumption is that these scheduled jobs do not have access to a display.
通常，当您不在计算机附近时，一般使用cron和at实用程序运行命令，这些程序通常会认为预定的作业不能访问播放器的图形化表示。
Although Cron has serious problems on a system that is shut down regularly, it is still the tool of choice for jobs that run frequently, such as hourly checks for new E-mail on a remote mail server.
尽管对于经常关闭的系统来说，Cron会造成一些严重的问题，但是，对于经常运行的作业，比如远程邮件服务器上每小时进行一次的新邮件检查，Cron仍然是一个重要的工具。
Jobs that require sequential processing can be submitted to the job spooler through cron by running each job one minute apart.
需要连续处理的作业可以通过cron提交给作业假脱机程序，每个作业间隔一分钟。
Running jobs at regular intervals is managed by the cron facility, which consists of the crond daemon and a set of tables describing what work is to be done and with what frequency.
以一定的时间间隔运行作业需要使用cron设施进行管理，它由crond守护进程和一组表(描述执行哪些操作和采用什么样的频率)组成。
You can manage your cron and at jobs.
可以管理cron和at作业。
If you roll back the system date, cron will not run any scheduled jobs until the clock reaches the date that the system had before the date roll-back.
如果你将系统的日期返回时钟计时程序将不能运行任何的计划任务直到时钟达到日期返回以前的时间为止。
If you roll back the system date, cron will not run any scheduled jobs until the clock reaches the date that the system had before the date roll-back.
如果你将系统的日期返回时钟计时程序将不能运行任何的计划任务直到时钟达到日期返回以前的时间为止。
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