topic Re: CRON JOB PROBLEM in Operating System - HP-UX

CRON JOB PROBLEM

HP UNIX Professionals — Mon, 26 Apr 2010 19:02:25 GMT

Hi Experts

I have problem in corn jobs,

1. when i check the corn jobs by "ps -ef | grep corn" Getting Outpur such as

BCCIB30:/ # ps -ef | grep cron
root 528 28967 1 15:51:14 pts/2 0:00 grep cron
root 15350 1 0 15:34:18 ? 0:00 cron start

2.When i am starting the cron jobs by"cront start" command

I am getting error like and page is hanging

BCCIB30:/sbin/init.d # ! cron is already running Mon Apr 26 15:45:47 EDT 2010
! ******* CRON ABORTED ******** Mon Apr 26 15:45:47 EDT 2010

Please veryfy the following output and guid me to start the corn job

Thanks & Regards,

Vinay

Re: CRON JOB PROBLEM

Patrick Wallek — Mon, 26 Apr 2010 19:10:30 GMT

It looks like the cron daemon is not running correctly.

When you do a 'ps -ef |grep cron' you should get something like this:

# ps â ef | grep cron
root 2773 1 0 Apr 8 ? 0:03 /usr/sbin/cron

Try stopping and restarting cron itself:

# /sbin/init.d/cron stop

See if the is still a 'cron start' running. If so, kill it.
# ps -ef |grep cron

Once there are no cron daemons running, try starting cron.

# /sbin/init.d/cron start

Now see what is running again. If you see 'cron start' then something is wrong. Check the various log files (/var/adm/syslog/syslog.log, /etc/rc.log, /var/adm/cron/log) and see if there are errors.

If you see '/usr/bin/cron' as above then it should be OK again.

Re: CRON JOB PROBLEM

Steven E. Protter — Mon, 26 Apr 2010 19:42:32 GMT

Shalom Vinay,

If the problem persists, you may need to copy /sbin/init.d/cron from a HP-UX system that is working right.

The startup script itself might be damaged.

SEP

Re: CRON JOB PROBLEM

James R. Ferguson — Mon, 26 Apr 2010 19:55:48 GMT

Hi Vinay:

> When i am starting the cron jobs by"cront start" command

Are you actually doing:

# cron start

...when you mean to re-configure 'cron' to use a new 'crontab'?

Do you thus, mean:

# crontab file

A better way (than 'grep'ping the process table) to find the running 'cron' daemon (if any) is:

# UNIX95= ps -C cron -opid,comm,args

...which should yield something like:

PID COMMAND COMMAND
1555 cron /usr/sbin/cron

...if the 'cron' daemon is running.

Regards!

...JRF...

Regards!

...JRF...

Re: CRON JOB PROBLEM

Kapil Jha — Tue, 27 Apr 2010 02:55:13 GMT

I think somebody tried to start cron as
#cron start

you should try to kill it and just run
#/usr/sbin/cron

BR,
Kapil+

Re: CRON JOB PROBLEM

Raj Briden — Tue, 27 Apr 2010 03:47:58 GMT

i think restarting cron would work

You may submitting the cron job incorrectly if you do so by
placing root's cron file directly in /var/spool/cron/crontabs.
Instead, you should always use the crontab command to manipulate
cron jobs. Do not manually submit jobs by editing files or
adding files to /var/spool/cron/crontabs/. Use the crontab
command to do that work for you.

Execute the following as root in order to clear up the problem:

1) Normally, you would use crontab to modify an existing
cron schedule, but since you previously tried to set up your
cron jobs by moving a file into /var/spool/cron/crontabs,
start by moving that file to a workfile:
mv /var/spool/cron/crontabs/root /tmp/cronfile
2) cd /tmp
3) crontab cronfile

If this does not resolve the problem, then try killing and restarting
the cron(1M) daemon.

Please note that once you have a working cron configuration, and wish
to change the schedule or add/delete cron jobs, then you use crontab(1)
and not cp(1)/mv(1). Please note that you must be signed on as the
specific user whose cron jobs you are trying to modify. Here are some
typical commands to use:

- To list your current set of cron jobs:
crontab -l

- To list your current set of cron jobs to a file named cronfile
that can been modified:
crontab -l > cronfile

- To submit a crontab file to cron:
crontab cronfile

- To edit a previously submitted crontab file:
crontab -e

- To remove all cron jobs:
crontab -r