HELP!! crontab

karleong · 07-08-2003, 03:28 AM

Help~~!
Does anyone know how to run a java application using crontab?
Please give me some example, thanks.

kuyalfinator · 07-08-2003, 05:39 AM

I used the following command to find out about crontab
$man crontab

DESCRIPTION
Crontab is the program used to install, deinstall or list the tables
used to drive the cron(8) daemon in Vixie Cron. Each user can have
their own crontab, and though these are files in /var, they are not
intended to be edited directly.

trying using these commands to research more about cron and crontab

$man -S5 cron
$man -S8 crontab

karleong · 07-09-2003, 01:23 AM

I had try it already, but they don't have any example about how to run a java application.

Qex · 07-09-2003, 03:38 AM

I have not done this but make sure that the file is executable...chmod 755

kuyalfinator · 07-10-2003, 04:31 AM

http://www.linuxquestions.org/questi...hlight=crontab

Here is another thread that might be a little more helpful. I tried look for the crontab settings, but only got this far.

Code:

$crontab -l
# DO NOT EDIT THIS FILE - edit the master and reinstall.
# (/tmp/crontab.1425 installed on Thu Jul 10 02:15:17 2003)
# (Cron version -- $Id: crontab.c,v 2.13 1994/01/17 03:20:37 vixie Exp $)

$pwd
/etc

$ ls cr*
crontab

cron.d:

cron.daily:
00-logwatch  0anacron  logrotate  makewhatis.cron  rpm  slocate.cron  tmpwatch

cron.hourly:

cron.monthly:
0anacron

cron.weekly:
0anacron  makewhatis.cron

$more crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/

# run-parts
01 * * * * root run-parts /etc/cron.hourly
02 4 * * * root run-parts /etc/cron.daily
22 4 * * 0 root run-parts /etc/cron.weekly
42 4 1 * * root run-parts /etc/cron.monthly

karleong · 07-11-2003, 02:43 AM

thanks for the information,
but the java application that i want to run is
like MyClassName.class.

when it run in a terminal is like:

$java MyClassName

Does anyone had try it before?

cmfarley19 · 07-11-2003, 05:04 AM

Have YOU tried it before?

karleong · 07-11-2003, 09:39 AM

$java MyClassName
can run in the terminal.
But i don't know how to make it run by using crontab.

cmfarley19 · 07-11-2003, 09:48 AM

Try editing your crontab file with:

Code:

0 * * * * java MyClassName > /dev/null 2> /dev/null

Where 0 * * * * is the time interval you want it to run.

karleong · 07-12-2003, 10:54 AM

I don't know why but there don't have any respone
apache is already running and
0 * * * * wall "testing"
can use but it don't run my java apllication