crontab | 易学教程

Php Cron Job on XAMPP Windows

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问题 Well I am new to the term CRON . What I know about this, it is a Unix concept to schedule particular operation to be executed after a defined time interval. I need to run a php file, to update database once every hour. But my confusion is with scheduling the execution. I am using XAMPP for local development test on Windows 7. What I found: How to run a php file as a cron job in cPanel in Bigrock Shared Hosting service? Setting Up A Cronjob In Windows Xampp How to create cron job using PHP? In

crontab doesn't execute 'ioreg' on my mac

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问题 I would like track my battery information on my mac, So I assign a script file to crontab but it doesn't work. #!/bin/bash #getbattery.sh CURRENT_CAPACITY=$(ioreg -l -n AppleSmartBattery -r | grep CurrentCapacity | awk '{print $3}') MAX_CAPACITY=$(ioreg -l -n AppleSmartBattery -r | grep MaxCapacity | awk '{print $3}') CHARGE=$(echo $CURRENT_CAPACITY $MAX_CAPACITY | awk '{printf ("%i", $1/$2 * 100)}') echo "$CHARGE""% $(date) " - #my crontab content: */1 * * * * ~/getbattery.sh >> ~

Linux crontab命令

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命令简介 Linux crontab是用来定期执行程序的命令。当安装完成操作系统之后，默认便会启动此任务调度命令。 crond 命令每分钟会定期检查是否有要执行的工作，如果有要执行的工作便会自动执行该工作。而linux任务调度的工作主要分为以下两类： 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。语法 crontab [ -u user ] file 或 crontab [ -u user ] { -l | -r | -e } 说明 crontab 是用来让使用者在固定时间或固定间隔执行程序之用，换句话说，也就是类似使用者的时程表。 -u user 是指设定指定 user 的时程表，这个前提是你必须要有其权限(比如说是 root)才能够指定他人的时程表。如果不使用 -u user 的话，就是表示设定自己的时程表。 crontab 常用命令如下 crontab -e # 修改 crontab 文件，如果文件不存在会自动创建。 crontab -l # 显示 crontab 文件。 crontab -r # 删除 crontab 文件。 crontab -ir # 删除 crontab 文件前提醒用户。 service crond

How to test crontab entry?

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问题 I have an entry in my crontab that looks like this: 0 3 * * * pg_dump mydb | gzip > ~/backup/db/$(date +%Y-%m-%d).psql.gz That script works perfectly when I execute it from the shell, but it doesn't seem to be running every night. I'm assuming there's something wrong with the permissions, maybe crontab is running under a different user or something. How can I debug this? I'm a shared hosting environment (WebFaction). 回答1: You need to escape "%" characters in crontab entries with backslashes-

run php script once in a week

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问题 every Monday I need to empty few fields of a MYSQL database I have Firstly I thought about using a cron job, but my Web Hosting provider (fatcow.com) doesn't support neither SSH or Command Lines into shared servers. I've also thought about checking the date() to see if it's monday and perform something, but then I need to run that specific page continuously and I've read that it's a problem. So now I ask you, how can I do this ? Thanks for answers 回答1: If your job can reached via a URL, you

New log file every time cron job runs

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问题 I have figured out how to output cron jobs to a log file using >> and providing a path to the log file. The >> appends log information to the existing file. How can I make it so the cron job creates a new log file every time it runs? (i.e. rsync.log , rsync(1).log , rsync(2).log -- ideally though I'd like the file name of the log to be something like DD-MM-YY.log ). I want a separate log file so this one log file doesn't get so huge and if/when we go to look if a file/folder was successfully

Crontab / Running cronjob on first sunday in month [duplicate]

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问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: cron : how to schedule to run first Sunday of every month I want to execute a php script on every first sunday in month at 7 am . I entered the following line in the servers crontab. 0 7 1-7 * 0 user /path/to/script.php Today I saw that the script did run on wednesday morning. How could that happen? I thought that the last 0 defines sunday? Thanks for your help in advanced. 回答1: From the man page: Commands are

Run crontab with user input

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问题 i created a crontab which will run a bash script test.sh. This test.sh file requires some input from the user, and saves the user input into a variable. How do i ensure that the user input will be saved to a variable in test.sh, and when crontab runs the script i can get the output i want? for e.g i have 2 files, file1.sh and file2.sh. i put file2.sh in file 1.sh. i then run file1.sh, get the user input, and save it somewhere. crontab will run file2.sh, and retrieve the value from the " saved

EC2_HOME is not set. Run AWS Commands from Cron

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问题 Basicly I'm not sure how to get my aws commands to run in crontab. I know I need to give crontab some environmental variables so that it can run the aws commands but, I don't quite know how to do that. Has anyone been able to do this before? PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/opt/aws/bin:/home/ec2-user/bin:/opt/aws/bin * * * * * export EC2_HOME=/opt/aws/apitools/ec2 * * * * * export JAVA_HOME=/usr/lib/jvm/jre 0 8 * * 1-5 ec2-start-instances instance_id 0 7 * *

how to write cron job in play framework 2.3

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问题 I'm using Play 2.3.8(activator) & Mongodb as db I've some products in products collection and each product has expiry date and once its expiry I need to remove documents in products collection. I'm planing to write cron job to remove documents in products collection which will run every day at once in particular time. I'm thinking I can use Annotations like @on, @Every in java(I'm writing code in play java, not play scala). but when I googled i got some plugins or tools or solutions a) https: