crontab

date +“%Y-%m-%d” in crontab

試著忘記壹切 提交于 2019-11-29 17:44:07
If I put the following in crontab -e : * * * * * date +"%Y-%m-%d" > /home/apps/temp/env.txt there is no env.txt created. If I change the above line to: * * * * * date > /home/apps/temp/env.txt env.txt is created properly. How can I format date in cron? You need to escape each one of the % : * * * * * date +"\%Y-\%m-\%d" > /home/apps/temp/env.txt Or even better, remove the quotes and leave like this: * * * * * date +\%Y-\%m-\%d > /home/apps/temp/env.txt 来源: https://stackoverflow.com/questions/21749305/date-y-m-d-in-crontab

Linu计划任务/crontab命令

江枫思渺然 提交于 2019-11-29 16:55:40
周期性任务计划 相关程序包: cronie:主程序包,提供了crond守护进程及相关辅助工具 cronie-anacron:cronie的补充程序;用于监控cronie任务执行状况;如cronie中的任务在过去该运行的时间点未能正常运行,则anacron会随后启动一次次任务 crontabs:包含CentOS提供系统维护任务 计划任务守护进程crond运行状态查看方法 CentOS7: systemctl status crond CentOS6: service crond status 编写计划任务两种方式:   系统计划任务设定:编写配置文件/etc/crontab   用户计划任务设定:执行# crontab -e 命令。在实际工作中,一般采用此方式设定计划任务 crontab命令 常用选项 crontab -l:查看自己的cron任务列表 crontab -e:通过EDITOR变量中定义的编辑器打开用户自己的cron配置文件;编辑单独的任务都使用-e选项,无论是删除、修改还是新建 crontab -r:移除crontab文件,慎用! crontab -i:同-r一同使用,以交互式模式让用户有选择的删除指定任务 crontab -u UserName:仅root可运行,指定某个用户,需要配合其他选项如-l -e使用例如:#crontab -e -u docker

Triggering a Java program based on database updates and time interval

两盒软妹~` 提交于 2019-11-29 16:44:58
I want a mechanism that will start a java program ( quite a big one ) depending on 2 conditions: N new inserts in a MySQL table Every 5 minutes interval. I know that I can do this through crontab or using Timer or using Stored Procedure etc. My plan is to write a Java class ( I am most familiar with ), Listener having two threads in parallel - Database Listener and Time listener threads each of them monitoring one of these conditions. If one says, yes, the parent class will start a new thread to run the Program. I feel that it will be a heavy weight program. Is there some other option that I

running php scripts locally though task manager

蹲街弑〆低调 提交于 2019-11-29 16:32:17
I'm looking for some advice. Rignt now i've got a bunch of php scripts that i've scheduled through cron. They run on my local machine doing stuff like pulling stuff out of a mysql db and sending automated emails. To run them I just have something like this in crontab: 0 7 * * 1 /usr/bin/php /phpscripts/script.php I need to migrate all of those scripts to a Windows machine. I'm planning to use the Windows Task Scheduler to run the scripts, but how can I run the actual php scripts locally? From what I understand you need something like xampp to run the apache server? I guess what I need is a

How to run a Shell Script by Cron Job

徘徊边缘 提交于 2019-11-29 15:23:44
I have a Shell script like below echo "Hello World" The script is located in /root/scripts/ folder as test.sh I also created a cron job like below 0-59 * * * * ./scripts/test.sh Now the cron job is not printing the content in test.sh every minute. Let me know whether I have given a wrong directory or I have any other problem in my code. I would Be explicit wrt. your directory to execute from e.g. /root/scripts/test.sh . I don't know what cron would regard as the current directory Redirect stdout to a log file e.g. ...test.sh > /tmp/cron.log (you would likely want to redirect stderr at some

Linux定时任务Crontab命令详解

。_饼干妹妹 提交于 2019-11-29 14:39:47
转:https://www.cnblogs.com/intval/p/5763929.html Linux定时任务Crontab命令详解 linux 系统则是由 cron (crond) 这个系统服务来控制的。Linux 系统上面原本就有非常多的计划性工作,因此这个系统服务是默认启动的。另 外, 由于使用者自己也可以设置计划任务,所以, Linux 系统也提供了使用者控制计划任务的命令 :crontab 命令。 一、crond简介 crond 是linux下用来周期性的执行某种任务或等待处理某些事件的一个守护进程,与windows下的计划任务类似,当安装完成操作系统后,默认会安装此服务 工具,并且会自动启动crond进程,crond进程每分钟会定期检查是否有要执行的任务,如果有要执行的任务,则自动执行该任务。 Linux下的任务调度分为两类,系统任务调度和用户任务调度。 系统任务调度:系统周期性所要执行的工作,比如写缓存数据到硬盘、日志清理等。在/etc目录下有一个crontab文件,这个就是系统任务调度的配置文件。 /etc/crontab文件包括下面几行: cat /etc/crontab SHELL=/bin/bash PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=HOME=/ # run-parts 51 * * * * root

CentOS添加定时任务

穿精又带淫゛_ 提交于 2019-11-29 14:18:53
示例: CentOS系统想每天凌晨3点重启 打开/etc/crontab添加 # vi /etc/crontab ================================== 0 3 * * * root reboot 然后重启crond服务 # systemctl restart crond.service 来源: https://www.cnblogs.com/mc-r/p/11519422.html

定时任务之crontab命令

你。 提交于 2019-11-29 13:57:04
简介 crontab用于设置周期性被执行的命令 Linux系统中Linux调动工作分为两大类:   1、系统执行的工作:系统周期性所要执行的工作,如备份系统数据、清理缓存   2、个人执行的工作:某个用户定期要做的工作,例如每隔10分钟检查邮件服务器是否有新信,这些工作可由每个用户自行设置 /etc/crtontab   系统调度的任务一般存放在/etc/crontab这个文件下,里面存放了一些系统运行的调度程序,通过命令cat crontab查看   这些任务会在系统运行起来自动调用 /var/spool/cron   每个用户都会生成自动生成一个自己的crontab文件,一般位于/var/spool/cron目录下   执行命令crontab -r 就会删除当前用户的crontab文件。例如你切换到suifeng账号下,执行了该命令,那么/var/spool/cron/suifeng文件就会删除,如果要创建该文件只需要用crontab -e命令即可。   注意,普通用户一般没有权限访问/var/spool/cron /etc/crontab.deny文件与/etc/crontab.allow文件   1、分别表示不能使用crontab命令的用户、以及能够使用crontab命令的用户   2、两个文件同时存在crontab.allow文件优先   3

centos 定时执行脚本

做~自己de王妃 提交于 2019-11-29 11:46:48
1.安装crontab #yum install crontabs 2.编辑定时任务: #crontab -e 3.路径要写绝对路径 * * * * * python /home/xxx.py ###每分钟执行一次 #5 * * * * python /home/xxx.py ###每小时05分时执行一次 4.重启服务 #service crond restart 来源: https://blog.csdn.net/weixin_41396062/article/details/100802159

How can i set a crontab to execute a mysql query and log the output?

三世轮回 提交于 2019-11-29 11:25:26
Well, title self describes it.. I need to run a sql function to clean some duplicated posts, i need to do it several times a day so i need to use cron... I set a new crontab job, like this: 00 16,18,19,20,21 * * * mysql -h MY-DB-HOST.COM -u MY-DB-USERNAME -pMY-DB-PASSWORD -e "delete from hotaru_posts where post_id in ( select post_id from ( select post_id from hotaru_posts a group by post_title having count(post_title) > 1 ) b )" >> /tmp/cron_job.log but nothing seems to be logged, so i supposed its not working. Theres no problem with the sql sentence, thats not the issue here. Anything wrong