02-12-2009
Stopping Cron Mail to administrator
I have written a number of shell scripts which I have added to cron to run on an Apple Xserve running MAc OS Server 10.4.11.
Recently I configured postfix to use one of my company's email servers as a relay so that it can send out statistics about the number of jobs my shell scripts have processed.
The problem is that I've just brought the email server to its knees when it received approx 45,000 mail from the Xserve, I can only assume that these mail must be legacy messages from cron which the server has now decided to send via the email server. So
1. Does anyone know why these messages for the local administrator account are now routed via the external email server
2. How can I stop cron sending out messages to administrator
Thanks in advance for any help as my eMail admin wants to crucify me!!!
9 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I need to do some DB maintenance, but there are cron jobs running all weekend.
How do I stop the cron jobs (that I see when I do a crontab -l) for the weekend then restart the cron jobs.
My understanding is that when the system is startted cron jobs in the /usr/spool/cron/crontabs folder are... (2 Replies)
Discussion started by: cjcamaro
2 Replies
2. UNIX for Dummies Questions & Answers
I am looking for information on how to process mail using a cron job. The email server is a hosted ISP, so I simply have a POP connection to the mailbox.
Specifically, I want to fire a cron job at {x} time and have pine, mail, mailx, or some other suitable mail client utility process the... (1 Reply)
Discussion started by: EOD
1 Replies
3. Solaris
Hello All,
In SunOS 10, I have some cron jobs and it is running fine but the cron job outputs are not mailing to any acount of the system.
In other OS, we have option like MAILTO variable or /dev/null to disable but in Sun I have no idea how it is disabled by default and how do I... (13 Replies)
Discussion started by: Tlogine
13 Replies
4. What is on Your Mind?
Hello Unix Experts,
I'm going to be graduating with a CIS (Computer Information Systems) degree in the coming year. I have been offered an internship with a job title of Unix Administrator under a well known company. I understand that Unix is used for high-end servers in many large... (1 Reply)
Discussion started by: brentmd24
1 Replies
5. Solaris
Hi All,
My current version is 5.10 Generic_127127-11,
I'm not getting mails after cron for single os user
where as for others users im getting mail after cron.
i've not found any mail file in /var/mail for that particular user, and i have created a new mail file. but no luck
please... (1 Reply)
Discussion started by: adeel_dba
1 Replies
6. Shell Programming and Scripting
Hi,
I am new to this mail concept and cran jobs,i have given with a task to send a mail for every one hour from unix to my outlook by checking some sanitry checks kindly look the below queires and help me in this
1.)How to send a mail from unix box to outlook.
2.)I assigned to check a... (4 Replies)
Discussion started by: thelakbe
4 Replies
7. Red Hat
Hi,
on server Red Hat Enterprise Linux AS release 3, I am getting the mail "you have mail" can any body suggest how to stop this? mail are getting generated in below path.
/var/spool/postfix/maildrop, due to which heavy file are getting generated.
though sendmail service is stopped.
... (0 Replies)
Discussion started by: manoj.solaris
0 Replies
8. Shell Programming and Scripting
Hi All,
i Have An Script Which is Fetching Data From DB And sending Mail With the Data in Excel Format.
i'm Receiving Mail with Attachment when i Manually Running the script using ksh -x Scriptname or ./ Scriptname.
when i try to run it through cron i'm receiving mail only but ... (7 Replies)
Discussion started by: naveen1.kumar
7 Replies
9. Shell Programming and Scripting
Hi,
I have scheduled one job in crontab. I want to stop the job automatically after some time of its execution without killing it.
Could i archive the above? (8 Replies)
Discussion started by: mehulleo
8 Replies
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)