11-11-2009
Thanks for the replies guys!
@ thegeek
Yeah, you pretty much confirmed what I was afraid of. Lucky I didn't test it haha ouch.
@ Scrutinizer
Yeah, looks like I'll probably have to do something like that. I'm pretty sure I'm limited to creating new jobs via the cpanel in my case, but thinking I could setup two simple jobs, one to run a php script to generate a random time and store that somewhere as a string, then a second that runs more often which would only do something if a result matched the first generated time, using a simple if statement. That would make sure it only ran the every few days (via cron), and then only once at a random time.
Thanks for your help guys!
P.S. I suppose thinking about it, if the cron settings did work how I thought in my first post, it would ruin about 90% of everyone elses setups in the world wouldn't it.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi All ,
We have few scripts which uses common environment/path setting variables.
Now instead of putting classpath , framework,java_home ..... etc. in all the script, can we make a file with all common settings which can be envoked by the scripts while running. If yes , say setting file is... (3 Replies)
Discussion started by: pankajkrmishra
3 Replies
2. UNIX for Dummies Questions & Answers
can anybody explain the usage of CRON for adding a cron job. please provide an example also for better understanding !!!
Thanks (1 Reply)
Discussion started by: skyineyes
1 Replies
3. Linux
I created a cron script that runs on the command line but not in crontab. What could be causing it to not run ? (5 Replies)
Discussion started by: dannyd
5 Replies
4. Solaris
I run cron in solaris 10 zone. One cron job which syncing files to nfs mounted on container, creates after finishing another cron proccess(/usr/sbin/cron), and after 100 existing cron proccesses next cron job will not start. It's too weird for me, I'm not able to solve this problem. Theoretically... (3 Replies)
Discussion started by: ron76
3 Replies
5. UNIX for Dummies Questions & Answers
Hi,
How to monitor whether a cron job is running or errored out..?other than checking the process using ps-aef
how to enter the cron job which throws the output in 1 file and errors in other file. i remember it can be done using >1 and >2 ..but not sure..
any expert..please help!! (1 Reply)
Discussion started by: rujus
1 Replies
6. Shell Programming and Scripting
Now I have a list of numbers in hand and I try to put the numbers into two columns. Can I do this work with any script? Great thanks to your help!
1A1.log
HF=-240.451527
HF=-240.5213996
1A2.log
HF=-240.451527
HF=-240.5213996
1B.log
HF=-240.4273718
HF=-240.4956636
1C.log... (7 Replies)
Discussion started by: liuzhencc
7 Replies
7. Solaris
Hi ,
I have removed a cron for particular user , but cron job seems to be running even after the cron entry is removed. The purpose of the cron was to sendmail to user ( it uses mailx utility )
I have restarted cron and sendmail service still user is getting mail alerts from the cron job. And... (4 Replies)
Discussion started by: chidori
4 Replies
8. Shell Programming and Scripting
Hi
I have a requirement to write a shell script,that will check the all commented job in cron job.Please help !! (2 Replies)
Discussion started by: netdbaind
2 Replies
9. Shell Programming and Scripting
Hi,
1)
If some job supposed to run on 1st of every month at 7 AM
In cron job when we have a blackout on the 1st ( i.e when 1st falls on a sunday ) how can we make the job run the next business day?
2) How can we run a job on 25th of every quarter 7 AM(jan,apr,jul,oct)
And if 25th... (5 Replies)
Discussion started by: System Admin 77
5 Replies
10. UNIX for Dummies Questions & Answers
Hi,
I have a cron job that I want to run twice a week, on Tues/Thurs, and I want it to run three times - specifically at 10pm, 11:10pm, and 12:20am respectively.
I "think" the way to do this is to run the following:
00,10,20 22,23,00 * * 2,4 MYCOMMAND
Just wanted to verify this... (4 Replies)
Discussion started by: xdawg
4 Replies
LEARN ABOUT CENTOS
crontabs
CRONTABS(4) Crontabs users' Manual CRONTABS(4)
NAME
crontabs - configuration and scripts for running periodical jobs
SYNOPSIS
run-parts [--list|--test]<directory>
DESCRIPTION
Crontabs is a historical name for the run-parts script and the system crontab. The run-parts script runs all executables in the specified
directory. Run-parts runs all executables in the specified directory. The execution of files can be allowed or denied by creating file
jobs.allow or jobs.deny which worked similar as other allow/deny config files. The file must be created in the specified directory.
--list print names of all files (not limited to executables), but don't run them. This option can't be used with test option.
--test print names of files, which would be run.
Randomization of jobs can be configured in the /etc/sysconfig/run-parts file. To enable randomization of jobs, set the RANDOMIZE
parameter to 1 and set the RANDOM parameter to an integer which determines a random seed. Additionally, you may configure the RAN-
DOMTIME parameter (again, by specifying an integer) to provide an additional level of randomization. Jobs are not randomized when
the RANDOM and RANDOMTIME parameters are set to 0. Values in these two parameters must be set to 1 or larger to provide a good
enough randomization.
Randomization of cron jobs can be useful for shared networks, where multiple cron jobs executed at once can cause spikes in traffic,
especially during daily jobs. With randomized jobs, the workload is evenly distributed throughout the day.
EXAMPLE OF CONFIGURATION FILE
RANDOMIZE=1
RANDOM=4
RANDOMTIME=8
Historically the crontab file contained configuration which called run-parts on files in cron.{daily,weekly,monthly} directories. These
jobs are now run indirectly through anacron to prevent conflicts between cron and anacron. That means the anacron package has to be
installed if the jobs in these directories should be running. Refer to the anacron(8) how to limit the time of day of the job execution.
EXAMPLE
/etc/cron.daily/jobs.deny could contain for example 0logwatch which forbid execution of this script.
SEE ALSO
anacron(8), crontab(5)
Marcela Malaova 2012-08-29 CRONTABS(4)