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TazG
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Joined: 22 May 2004
Posts: 320
Location: Canada
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 Posted: Sat Sep 25, 2004 6:52 pm Post subject: Cron doesn't work |
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I'm trying to use Cron. I have no experience with it. I have vixie-cron, and it is running. I tried to have it start Xine every 5 minutes as a test. I set it up with KCron. | Code: | crontab -l
# DO NOT EDIT THIS FILE - edit the master and reinstall.
# (/tmp/kde-taz/kcronvdbcSb.tmp installed on Sat Sep 25 15:18:41 2004)
# (Cron version -- $Id: crontab.c,v 2.13 1994/01/17 03:20:37 vixie Exp $)
# test
0,5,10,15,20,25,30,35,40,45,50,55 * * * * /usr/bin/xine
# This file was written by KCron. Copyright (c) 1999, Gary Meyer
# Although KCron supports most crontab formats, use care when editing.
# Note: Lines beginning with "#\" indicates a disabled task. |
What did I miss?? |
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inode77
Veteran
Joined: 20 Jan 2004
Posts: 1303
Location: Heart of Europe
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| Posted: Sat Sep 25, 2004 7:12 pm Post subject: |
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I suggest you type crontab -e in your shell. (It should open your default editor and allow you to edit the file including a sanity check after save&quit)
| Code: | # minute (0-59),
# | hour (0-23),
# | | day of the month (1-31),
# | | | month of the year (1-12),
# | | | | day of the week (0-6 with 0=Sunday).
# | | | | | commands
# | | | | | |
# | | | | | |
0 10 * * * /usr/bin/rdate -s swisstime.ee.ethz.ch &> /dev/null
# | | | | | |
0 20 * * 3 /usr/sbin/eupdatedb &> /dev/null
# | | | | | |
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TazG
Guru
Joined: 22 May 2004
Posts: 320
Location: Canada
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| Posted: Sat Sep 25, 2004 7:44 pm Post subject: |
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| It doesn't work with crontab -e either. |
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inode77
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Joined: 20 Jan 2004
Posts: 1303
Location: Heart of Europe
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| Posted: Sat Sep 25, 2004 8:24 pm Post subject: |
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OK let's try some stuff....
1.) Make sure your cron runs
should return a line like this: | Code: | | root 6557 1 0 12:25 ? 00:00:00 /usr/sbin/cron |
2.) Add this line to your cron using "crontab -e"
| Code: | 5,10,15,20,25,30,35,40,45,50,55 * * * * /usr/bin/logger "CRON_TEST" &> /dev/null
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Check if the crontab has the line added after quiting with
3.) Wait some time and then check your /var/log/messages with
| Code: | | grep CRON_TEST /var/log/messages |
and check the times when and if the messages do appear. |
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TazG
Guru
Joined: 22 May 2004
Posts: 320
Location: Canada
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| Posted: Sun Sep 26, 2004 3:55 am Post subject: |
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| Well that did work - I got "CRON_TEST" in the log every 5 minutes. So, maybe it's only graphical programs that don't start? What if I wanted one to though, what can I do about this? |
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hjnenc
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Joined: 15 Aug 2004
Posts: 1599
Location: Vienna, Austria
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| Posted: Sun Sep 26, 2004 8:03 am Post subject: |
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The cron jobs are run whenever the machine is running. It is not necessary that somebody is logged in nor that X is running. It is therefore probably not a good idea to try that. Depending on the program run and the person currently logged in it may also open up security holes.
If you really need to do that, make sure to set up the environment correctly for GUI programs (DISPLAY, XAUTHORITY, ...). |
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zurd
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Joined: 17 Dec 2003
Posts: 228
Location: Canada, Montreal
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