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Operating Systems Linux cron configuration
# 15  
Old 01-19-2011
I finally found an error in the log file;
But I don't really know what it means, so I show you the files:
It seems the error in in ssh , not cron.
So I should open a new thread, should not I?
The other problem is that I dont find /home/filename !!!!
Code:
$ more /opt/etc/crontab
SHELL=/bin/sh
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/opt/sbin:/opt/bin
MAILTO=""
HOME=/
# ---------- ---------- Default is Empty ---------- ---------- #
* * * * * touch /home/filename
1,5,10,15,20,25,30,35,40,45,50,55 * * * *  root /opt/scripts/rsync_backup

Code:
$ more /opt/scripts/rsync_backup
/usr/bin/rsync -avz rsync://192.168.1.2/TEMP /DataVolume
/usr/bin/rsync -avz rsync://192.168.1.2/DOCS /ExtendVolume

Code:
 $ tail /var/log/messages
Jan 19 08:30:34 LBadinRAID1 daemon.err inetd[811]: ssh/tcp (2): bind: Address already in use
Jan 19 08:35:01 LBadinRAID1 cron.info /opt/sbin/cron[28636]: (root) CMD (root /opt/scripts/rsync_backup)
Jan 19 08:40:01 LBadinRAID1 cron.info /opt/sbin/cron[28822]: (root) CMD (root /opt/scripts/rsync_backup)
Jan 19 08:40:34 LBadinRAID1 daemon.err inetd[811]: ssh/tcp (2): bind: Address already in use
Jan 19 08:45:01 LBadinRAID1 cron.info /opt/sbin/cron[29180]: (root) CMD (root /opt/scripts/rsync_backup)
Jan 19 08:50:01 LBadinRAID1 cron.info /opt/sbin/cron[29453]: (root) CMD (root /opt/scripts/rsync_backup)
Jan 19 08:50:34 LBadinRAID1 daemon.err inetd[811]: ssh/tcp (2): bind: Address already in use
Jan 19 08:55:01 LBadinRAID1 cron.info /opt/sbin/cron[29724]: (root) CMD (root /opt/scripts/rsync_backup)
Jan 19 09:00:34 LBadinRAID1 daemon.err inetd[811]: ssh/tcp (2): bind: Address already in use

Last edited by Franklin52; 01-19-2011 at 04:12 AM..
# 16  
Old 01-19-2011
I repeat: /etc/crontab has a different syntax than the user crontab. There's one more field, after the time fields -- the username to run the program under. Since you forgot the username, you're not telling it to run 'touch filename', you're telling it to run 'filename' under the user 'touch'!

I think you should run touch /tmp/filename anyway. /home/ might be in internal flash ROM for an embedded system, and you don't want to overwrite internal flash any more than you have to -- it's got a way more limited number of write cycles than your average USB flash drive. But /tmp/ is probably a ramdisk.

So:

Code:
* * * * * root touch /tmp/filename
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