crontab command

Linux Crontab Timing Task Commands[Date: 2016-02-13] Source: Linux Community The database needs to be automatically backed up at 0 points per day, so a scheduled task needs to be established. I chose to use crontab to add a timed task to execute the shell file under Linux. The shell file has a database backup command.I. Crontab INTRODUCTIONThe function of the

The crond service is usually stored in/etc/init. d/crond, so that the crond service can be automatically started after the system starts. Linux users use the crontab command to configure cron tasks. Crontab contains cron. d, cron. daily, cron. Weekly, cron. Monthly, cron. Hourly five directories and crontab files u

1. Definition:The crontab command is commonly used in Unix-and Unix-like operating systems to set instructions that are executed periodically. The command reads the instruction from the standard input device and stores it in a "crontab" file for later reading and execution. The word derives from the Greek language Chro

Article Source:http://blog.chinaunix.net/uid-7552018-id-182133.htmlToday I made a backup script of the database, and by the way the system had to learn the settings of the timed execution script under Linux. Linux scheduled execution is mainly used in the crontab file to add a custom plan to execute, the setup is slightly more complicated than Windows (because there is no graphical interface), but it is not very complex, basically used once to remembe

*/15 * * * lsThat is, the No. 0 15 30 45 60 minutes per hour executes the LS command 9, every month, every 10 days 6:30 execute the LS command6 */10 * * lsThat is, 1, 11, 21, 31st of the month, yes 6:30 executes the LS command. 10. Execute all executable files in the/etc/cron.daily directory as root 7:50 every day7 * * * Root run-parts/etc/cron.dailyNote: The Run-parts parameter indicates that all executabl

Do a Linux timed task today (summarize the table every 12 o'clock in the evening).By the way, write a blog record ~ ~Why use Linux timed tasks instead of scheduling tasks on the project? The reason is to prevent the project from collapsing for various reasons. So I used a more stable Linux timing task (I think so (^_^)).At first I felt very simple, thought that at most half an hour to take care of,, the result from 10 points to get 12:30 only to fix (mainly my English too slag and database error

Because Chiang just helped a netizen on his behalf to deal with the requirements of the VPS host scheduled restart function, such as he needs to restart the server every morning 5, we can set the timing reboot execution can be. First, install crontab executable environment The general vps/server is supported, but some may not support the need for us to give the installation. A-centos system #安装CrontabYum Install Vixie-cron Crontabs#设置开机启动CrontabCh

First, preface Today, simply record the configuration of the crontab Ii. Catalogue of Crontab /etc/crontab file This is the scheduled task for the system to run/var/spool/cron directory user-defined crontab tasks are placed in this directory ls–lrt/etc/cron* /etc/cron.deny Rep

Crontab Scheduled Task configuration record First, preface Today, simply record the configuration of the crontab Ii. Catalogue of Crontab /etc/crontab file This is the scheduled task for the system to run/var/spool/cron directory user-defined crontab tasks are placed

when the command will runMinutes (0-59)Hours (0-23)Date (1-31)Month (1-12)Day of the week (0-6, of which 0 stands for Sunday, as if 7 also represents Sunday)The 6th field is a string to execute at an appropriate time.Example:#MIN HOUR Day MONTH DAYOFWEEK COMMAND#每天早上6点10分6 * * * DateName: crontabUsage rights: All usersHow to use:crontab file [-u user]-replaces the current

In AIX and Linux, crontab introduces similar crontab usage in AIX and Linux. First, it introduces Crontab usage in Linux, and then introduces differences between AIX and Linux. 1. Crontab the crontab command is used to schedule th

showing the program execution content. If you do not want to receive such a letter, add>/dev/null 2> 1 after each line is empty. Example 2:#06:10 every morning10 6 **** date# Every two hours0 */2 * Date# Every two hours from PM to am, am0 23-7/2, 8 **** date# Am on the 4th day of each month and from Monday to Wednesday of each week0 11 4 * Mon-wed date# A.m. of July0 4 1 Jan * DateExample$ Crontab-l list the current