Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 2 hours at 20 minutes past the hour“: Field 1: (20) indicates that the task will be run atminute20. Field 2: (*/2) indicates that the task will be run every 2hour...
(1)添加一个计划任务,每隔20分钟与时间服务器pool.ntp.org同步一次,可以使用crontab命令的选项e建立计划任务: [root@localhost ~]# crontab -e 此时将会弹出一个交互式页面,实际为vim编辑器,按i键插入一下内容: #每隔20分钟与时间服务器同步一次时间,并写入硬件时钟 #Synchronize the time every20minutes.*/20*...
#Python实用宝典importscheduleimporttimedefjob():print("I'm working...")schedule.every(10).minutes.do(job)whileTrue:schedule.run_pending()time.sleep(1) 上面的代码表示每10分钟执行一次 job 函数,非常简单方便。你只需要引入 schedule 模块,通过调用**scedule.every(时间数).时间类型.do(job)** 发布周...
[例] 我们来看一个超级用户的crontab文件: #Run the ‘atrun’ program every minutes #This runs anything that’s due to run from ‘at’.See man ‘at’ or ‘atrun’. 0,5,10,15,20,25,30,35,40,45,50,55 * * * * /usr/lib/atrun 40 7 * * * updatedb 8,10,22,30,39,46,54,...
#Run the ‘atrun’ program every minutes #This runs anything that’s due to run from ‘at’.See man ‘at’ or ‘atrun’. 0,5,10,15,20,25,30,35,40,45,50,55 * * * * /usr/lib/atrun 40 7 * * * updatedb 8,10,22,30,39,46,54,58 * * * * /bin/sync...
Every 5 minutes (*/5 * * * *) Twice an hour (0,30 * * * *) Once an hour (0 * * * *) Twice a day (0 0,12 * * *) Once a day (0 0 * * *) Once a week (0 0 * * 0) 1st and 15th (0 0 1,15 * *) ...
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every hour between 11:00 am and 11:00 pm“: Field 1: (0) indicates that the task will be run atminute0. Field 2: (11-23) indicates that the task will be run betweenhours...
For instance, you could use the following command if you need to run a backup script every 20 minutes from 3:00 p.m. to 4:00 p.m. daily. */2015-16***/path/to/backup.sh The previous command works when you need to execute a job at a particular time, but what if you need the...
Every 5 minutes (*/5 * * * *) Twice an hour (0,30 * * * *) Once an hour (0 * * * *) Twice a day (0 0,12 * * *) Once a day (0 0 * * *) Once a week (0 0 * * 0) 1st and 15th (0 0 1,15 * *) ...
13、xpire.1st$#62;$#62;mm.txt例14 我们来看一个超级用户的crontab文件:#Run the atrun program every minutes#This runs anything thats due to run from at.See man at or atrun.0,5,10,15,20,25,30,35,40,45,50,55 * * * * /usr/lib/atrun40 7 * * * updatedb8,10,22,30,39,46...