How to: Use crontab to schedule tasks

Hi all,

I would like to schedule a crontab script, which should run From 8pm Thursday to 2am Friday and it should run every 10 minutes. I have put a script like below, is it the correct one.

Code: 10 01,02,20,21,22,23,00 * * 4-5 /u01/app/test.ksh Any other options available to schedule the same interval.

How do I invoke a crontab command so that I can schedule to run a script with a 20 minute delay based on some condition?

Edit: What if I wanted a command that schedules a script to be executed only as many times as the condition evaluated to true in the system? What are my options?

I was learning and experimenting with crontab today.

The default editor was just too difficult for me to figure out which caused me to remove my crontab by running crontab -r.

Now, when I run crontab -e and input my new cron task, nothing happens. I suspect it's the crontab -r command I executed earlier.

Can anyone help, please?

I would like to schedule my tasks every x months on day 1 starting for example, March. I am unsure if this is the syntax I'm looking for (for repeating the job every 4 months):

0 0 1 3/4 * /path/to/file

The man page for crontab does not explain in detail how the steps (/) work.

hi gurus.

I have a little script that runs java from a certain directory. This script runs fine when run manually but when I try to schedule it, it fails to find the script.

I have a strange thing (i think), I added a line in my crontab on an QNAP NAS with crontab -e i saved (:wq!)

This line would have had a script to run for every 5 minutes so i dit 5 * * * * and the script name. And restarted the crontab.

This script fills a database. Last night i quit trying, went to bed and kept de NAS running. And wen ik woke up this morning i looked at the database and the scr

Hello everyone,How do I schedule a custom .sh script that requires sudo?The situation I want is: The script runs according to schedule and appears in a terminal.  I have to type in a password before this script can run.  Then the script runs.Note:- The program I have for scheduling is cronie (default cron.)Here is the situation:I type: crontab -eIn the text editor, I add in: 0 17 * * * s

For example I want to schedule task using crontab: */2 * * * * /root/scripts/backup.sh

But nothing happens, backup.sh is not executed. Who can help me?

Quote:

# Output of the crontab jobs (including errors) is sent through # email to the user the crontab file belongs to (unless redirected). # # For example, you can run a backup of all your user accounts # at 5 a.m every week with: # 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/ # # For more information see the manual pages of crontab(5) and cron(8) # # m h dom mon d