Use Scheduled tasks in Linux +php Web-based programs to monitor Web server health "every 5 minutes and email alerts"One, my monitoring server environment:Rhel5.5+apache2.2+php5Second, function Description:Write a PHP page that implements the following functions:Request the content of one page of the Web server to be monitored, if the data is not returned, or the data returned does not contain the code I exp
Linux creates a scheduled task for the current user. type crontab-e to edit the crontab service file www.2cto.com. For example, the file content is as follows: */2 *****/bin/sh/home/admin/jiaoben/buy/deleteFile. sh save the file and exit */2 ***/bin/sh/home/admin/jiaoben/buy/deleteFile. sh */2 **** you can use this field to set when to execute the script/bin/sh/home/admin/jiaoben/buy/deleteFile. THE sh field can be used to set the script to be execute
IOS --- precautions for using NSTimer to set scheduled tasks
NSTimer is a timer mechanism in iOS development. It is often used to set scheduled tasks using its ischeduledTimerWithTimeInterval method.We will use a countdown timer to illustrate the following points of attention.Set timer
Click the button to add a countdo
Introduction to the Crontab command for executing scheduled tasks in Centos
1. Start and Stop Cron
Since Cron is a built-in service in Linux, you can use the following method to start and close the service:
/Sbin/service crond start // start the service/Sbin/service crond stop // close the service/Sbin/service crond restart // restart the service/Sbin/service crond reload // reload the configuration
2. Cron
the Internet and finally solved it. Let's take a look at the task I originally wrote. sh script:
#! /Bin/sh
Java-jar offergateway. biz. offer-1.0-SNAPSHOT.jar
Crontab scheduled tasks are written as follows:
* ***/Task. Sh
Later, I checked the Internet and said that to run crontab, you must use the absolute path. Then I changed all the paths to the absolute path.
In the crontab execution environment varia
()). ToString ());}}Spring Configuration >3. Other Notes Java Timer Timer has a configuration to start the party org.springframework.scheduling.timer.ScheduledTimerTask,There are two ways to configure the quartz timer to start: Org.springframework.scheduling.quartz.simpletriggerbean,org.springframework.scheduling.quartz.crontri Ggerbean.Org.springframework.scheduling.quartz.CronTriggerBeanThe Linux system's scheduled
output to be processed, such as appending to a particular log file. 3 when the crontab suddenly fails, you can try/etc/init.d/crond restart solve the problem. Or check the log to see if a job has execution/error tail-f/var/log/cron. 4 Don't run crontab-r. It removes the user's crontab file from the crontab directory (/var/spool/cron). All crontab of the user have been deleted. 5 in Crontab, the% has a special meaning, indicating the meaning of the line break. If you want to use the words must b
root 13 Mon Nov 30 17 : 00 : 00 2015 b root[[emailprotected] ~]# [Email protected]/]# echo "cal >>/tmp/test-at.txt" | At 01:38Job in Sun 29 01:38:00 2015[Email protected]/]# ATQMon-Nov-16:00:00 g rootMon-Nov-17:00:00 B RootSun Nov 01:38:00 a root[Email protected]/]#Use Cron to schedule a recurring scheduled task [email protected]/]# which tar/bin/tar[email protected]/]# which bash/bin/bash [Email protected]/]#Cat 1.SH#!/bin/BashA=`Date+%y%m%d '
The platform on which the system is accessed UserAgent can be used to determine the user browser type console.log (window.navigator.userAgent); The platform can be used to determine the type of system platform the browser resides on. Console.log (Window.navigator.platform);Scheduled Tasks start and closeTimer //Parameter 1: function //Parameter 2: Time---Milliseconds---1000 ms--1 sec //execut
/$dbname/ ${dbname}_$ (date+%f) [!-d $MYDIR ] mkdir-p $MYDIR $MYDUMP $dbname $tname |gzip> $MYDIR/${dbname}_${ tname}_$ (date+%f). sql.gzdonedone~ (3) Set Scheduled Tasks crontab Grammar:**** *commandminutehournbSp;daymonthweekcommand where:minute: represents minutes, Can be any integer from 0 to 59. Hour: Represents the hour, which can be any integer from 0 to 23. Day: Represents a date, which can be a
protected] ~]# Cat/etc/crontabShell=/bin/bashPath=/sbin:/bin:/usr/sbin:/usr/binMailto=roothome=/# for details see Mans 4 Crontabs# for details see Mans 4 Crontabs# Example of Job definition:#.----------------Minute (0-59)# | .-------------Hour (0-23)# | | .----------Day of Month (1-31)# | | | .-------month (1-12) OR jan,feb,mar,apr ...# | | | | .----Day of Week (0-6) (sunday=0 or 7) or Sun,mon,tue,wed,thu,fri,sat# | | | | |# * * * * * * user-name command to be executedThe first line of the shel
Set scheduled Tasks The effect of crontab–e and VI is the same, are edited->crontab–e join: 0 * */1 4 su-oracle-c/home/oracle/oracle.sh time-sharing sun and moon Week Oracle to run the task description: In the month of Thursday run dcms.sh file time range: minutes: 0 ~ 59 Hours: 0 ~ 23rd : 1 ~ 31 months: 1 ~ 12 weeks: 0 ~ 7 Description: Crontab–e-u:root permissions to help other users create/remove Crontab
after registration, we should create a new CronJob and pass an array containing the user ID. the model will serialize this array and save it to the database. when we get it, the model will deserialize it.Yii console commands
Now we have a model for work, Next let's take a look at the CronCommand we will run. (you can also get the source code in the https://github.com/aarondfrancis/yii-CronCommand). here I'll just talk about the key part.
In this example, the script entry point is the Index acti
work.* * * * * * tasks performedThe first one "*"The first few minutes of an hour0-59A second "*"The first hours of the day0-23A third "*"The first day of the one months1-31Fourth "*"The first month of the year1-12Fifth "*"The week of the week0-7 (0 and 7 both represent Sunday)3. Special Symbolic meanings*Represents any time. For example, the first "*" is meant to be executed every minute of the hour.,Represents a non-sequential time. For example, "0
Add/sbin/service crond start at the end of the/etc/rc.d/rc.local script and start automatically when the system starts.Some parameters and descriptions of CRON commandsCrontab-u #设定某个用户的cron服务, the general root user needs a secondary parameter when executing this commandCrontab-l #列出某个用户cron服务的详细内容Crontab-r #删除每个用户的cron服务Crontab-e #编辑某个用户的cron服务 AT commandIf we only want to have a specific task executed once, in this case it would be more appropriate for the at Monitor program. At similar to the
The so-called task plan is that the computer automatically calls the user to set up the application in advance, so as to simplify the user's operation. With the Windows 2000 Task Scheduler (which is no longer detailed here with the Cron program under *nix), we can schedule any script, program, or document to run at the most appropriate time to meet our needs. Let's take Windows 2000 for example.
Specifically, if we need to run the Task Scheduler automatically, we should perform the following st
29th, 58 minutes to execute29,58 * * * *Executes every 2 minutes*/2 * * * *15th per month, every three hours, every two minutes, perform tasks. */2 */3 15 * *15th per month, every three hours, every two minutes, perform tasks or seven every three hours per week, every two minutes.*/2 */3 15 * 7Practice:05 points per day of the 1,3,7,8,13,21 point of executionEvery month, from 5th to 20th, from 4 to 13, 15
every day"0 15 10?" * * "trigger 10:15 every day""0 15 10 * *?" Triggered 10:15 daily"0 15 10 * *?" * "10:15 per day" trigger"0 15 10 * *?" 2005 "2005-year daily 10:15 Trigger"0 * 14 * *?" Daily from 2 o'clock in the afternoon to 2:59 per minute trigger"0 0/5 14 * *?" Every 5 minutes from 2 o'clock in the afternoon to 2:55"0 0/5 14,18 * *?" Daily from 2 o'clock in the afternoon to 2:55 and from 6 to 6:55 every 5 minutes for two time periods"0 0-5 14 * *?" Daily 14:00 to 14:05 triggers per minut
Requirements:
A function module needs to be periodically executed. For example, an operation is executed at every day and an operation is executed every hour.
Use spring quartz to implement scheduled tasks
/** * The system automatically changes the order status to "REJECTED" and "REJECTED" to "REJECTED" and "REJECTED" within 3 days "* @ Author Jokey * */// ImplementationQuartzjobbeanOrg. springfra
Implementation of the PHP scheduled task
Implementation of PHP Scheduled Tasks (ZT)Article Category: PHP programming
Ignore_user_abort (); PHP scripts can continue to execute even if the client disconnects (such as turning off the browser).Set_time_limit (0); Execution time is unlimited, php default execution time is 30 seconds, through Set_time_limit (0) ca
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