Beard: Created page with "

 packages: 	cron  daemons: 	crond  configs: 	/etc/cronbtab - system tasks 	/etc/cron.d/ - caontains system cron tables 	/var/spool/cron/ - contains user cron tables. file..."

2016-02-29T21:09:15Z

Created page with "<pre> packages: cron daemons: crond configs: /etc/cronbtab - system tasks /etc/cron.d/ - caontains system cron tables /var/spool/cron/ - contains user cron tables. file..."

New page

<pre>
packages:
cron

daemons:
crond

configs:
/etc/cronbtab - system tasks
/etc/cron.d/ - caontains system cron tables
/var/spool/cron/ - contains user cron tables. files are saved by username.
/etc/cron.allow - users allowed to use cron. if allow/deny files do not exist, only root can use cron. this file has priority over cron.deny.
/etc/cron.deny - users not allowed to use cron. create this file and leave it blank to allow all user. this id default in Fedora.
/etc/cron.hourly/ - place shell scripts in here to be run at the given time interval.
/etc/cron.daily/ - place shell scripts in here to be run at the given time interval.
/etc/cron.weekly/ - place shell scripts in here to be run at the given time interval.
/etc/cron.monthly/ - place shell scripts in here to be run at the given time interval.

other:
* = wildcard
numbers can be comma separated (20,40)
numbers can be a range (1-5)
time is in 24-hour format

commands:
1 2 3 4 5 command
1 = minute past the hour (0-59)
2 = hour past midnight (0-23)
3 = day of month (1-31)
4 = month of year (1-12)
5 = day of week (0=sun 1=mon 2=tue 3=wed 4=thu 5=fri 6=sat 7=sun)

crontab - command that helps manage cron jobs
-u <user> - specify a user
-e - edit. opens crontab in editor of choice.
-l - list current crontab
-i - remove current crontab with a prompt.
-r - remove current crontab. NO PROMPT!
example:
20,40 17 * * 1-5 /myscript - runs 'myscript' at 5:20pm and 5:40pm each day, mondat through friday
0 4 1 * * /backup - runs 'backup' at the 1st of the month every month at 4:00am.

</pre>

Cron - Revision history

Beard: Created page with "
packages: cron daemons: crond configs: /etc/cronbtab - system tasks /etc/cron.d/ - caontains system cron tables /var/spool/cron/ - contains user cron tables. file..."