i try to execute the following in a crontab file and it doesn't work while the same line is OK on the Unix (AIX) shell command line.
it seems to be a pb related to date flags expression but i can't see why , somebody have an idea ?
regards
Christian
Last edited by Yogesh Sawant; 04-08-2008 at 05:41 AM..
Reason: added code tags
Hi all,
I am trying to run a script in crontab but I receive the email below. Note the empty variable SHELL. Apparently cron doesn't invoke a shell. That explains the errors in the script it is trying to execute. Anyone know what maybe wrong?
Subject: Output from cron job... (3 Replies)
Hi Folks,
Could you please suggest me how to run a shell script on a solaris env without using crontab. I am actually trying to write a shell script which will grep "WORD" in the logfile andd sends a email.Thanks in advance.
Thanks
Sandeep. (3 Replies)
Hi,
Can some one tell me if we can configure the jobs in crontab using a shell script.
I know it can be done easily by using "crontab -e", but i just want to know whether we can add a job into the crontab using a shell script.
If it can be done, plz suggest the procedure to do it.
If it... (6 Replies)
Is it possible to add a job to crontab with a shell script? The existing jobs in the crontab should exist as it was. The new job should be appended.
Also, the crontab file is /var/spool/cron/root. (1 Reply)
Hi All,
I have scheduled a script to run every five minutes through crontab. If there is any issue with the script which may need manual intervention, I have used the mailx commands. But at the same time, I would want the cron to be disabled until the issue is resolved. Once things are fine,... (2 Replies)
hi,
i have shell script which checks for service running on platform,
if service is receiving calls, then do nothing
if service is not receiving calls, then stop the service
i want to run this script in 2 timeslots.
i.e. in the day from 9 am to 5 pm it should run every 10 minutes
and ... (2 Replies)
Hi friends,
Actually i wrote many scripts in korn shell for time saving activity in storage domain. But every week i am spending some time for the running of script. So every Monday i wants to run my scripts automatically. So corn will be helpful according to my friend's opinion.
But I don't... (5 Replies)
Hi
Iam running below script in crontab but its not working.
#!/bin/sh
cd /Scripts
/usr/local/bin/expect -f /Scripts/bng_backup.exp /Scripts/data.txt
tar -cf bngbackup.tar bngbackup ;gzip bngbackup.tar
when iam running manually the output file is generating..but bngbackup.tar.gz file... (5 Replies)
I'm having a shell script which has to be run only once at the specified time.
Shell script is like following,
#!/bin/bash
db2 connect to XXX > connection_status.txt
This script is scheduled in crontab as following,
50 4 8 5 0 sh script.sh
scheduled script is run at the specified time... (1 Reply)
Hi everyone, can you help me ?, I have the following shell:
DIR="/backups/backdata"
DIR_2="/BACKOPENF/database"
LOG="/backups/logs/oracle_backup.log"
EXP_LOG="/backups/logs/Exp`date +%Y%m%d%H%M%S`.log"
EXP_FILE="Exp`date +%Y%m%d%H%M%S`.dmp"
HOLD_DAY=1
# String de conexion... (4 Replies)
Discussion started by: Manolo
4 Replies
LEARN ABOUT SUSE
cron
CRON(8) System Manager's Manual CRON(8)NAME
cron - daemon to execute scheduled commands (ISC Cron V4.1)
SYNOPSIS
cron [-l load_avg] [-n]
DESCRIPTION
Cron should be started from /etc/rc or /etc/rc.local. It will return immediately, so you don't need to start it with '&'. The -n option
changes this default behavior causing it to run in the foreground. This can be useful when starting it out of init.
Cron searches /var/spool/cron for crontab files which are named after accounts in /etc/passwd; crontabs found are loaded into memory. Cron
also searches for /etc/crontab and the files in the /etc/cron.d directory, which are in a different format (see crontab(5)). Cron then
wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute. When execut-
ing commands, any output is mailed to the owner of the crontab (or to the user named in the MAILTO environment variable in the crontab, if
such exists).
Additionally, cron checks each minute to see if its spool directory's modtime (or the modtime on /etc/crontab) has changed, and if it has,
cron will then examine the modtime on all crontabs and reload those which have changed. Thus cron need not be restarted whenever a crontab
file is modified. Note that the Crontab(1) command updates the modtime of the spool directory whenever it changes a crontab.
Daylight Saving Time and other time changes
Local time changes of less than three hours, such as those caused by the start or end of Daylight Saving Time, are handled specially. This
only applies to jobs that run at a specific time and jobs that are run with a granularity greater than one hour. Jobs that run more fre-
quently are scheduled normally.
If time has moved forward, those jobs that would have run in the interval that has been skipped will be run immediately. Conversely, if
time has moved backward, care is taken to avoid running jobs twice.
Time changes of more than 3 hours are considered to be corrections to the clock or timezone, and the new time is used immediately.
PAM Access Control
On SUSE LINUX systems, crond now supports access control with PAM - see pam(8). A PAM configuration file for crond is installed in
/etc/pam.d/crond . crond loads the PAM environment from the pam_env module, but these can be overriden by settings in the crontab file.
SIGNALS
On receipt of a SIGHUP, the cron daemon will close and reopen its log file. This is useful in scripts which rotate and age log files.
Naturally this is not relevant if cron was built to use syslog(3).
CAVEATS
In this version of cron, /etc/crontab must not be writable by any user other than root. No crontab files may be links, or linked to by any
other file. No crontab files may be executable, or be writable by any user other than their owner.
SEE ALSO crontab(1), crontab(5), pam(8)AUTHOR
Paul Vixie <vixie@isc.org>
4th Berkeley Distribution 10 January 1996" CRON(8)