I tried to set up the cron job any minute, I tried 3 different commands.
Any of them is not working.
Below is the error:
Run cron job every minute
The syntax is:
* * * * * /path/to/your/script > output
Related
I have a script that I would like to run 60 seconds after initial system reboot and then every 10 minutes after that. I currently need two cron job listings to achieve this:
*/10 * * * * php myscript.php
#reboot /bin/sleep 60; php myscript.php
The first listing will run my cron job immediately after system boot and so I need to have the second listing to account for the on start wait time.
Is there anyway to combine the above two cron listings into one?
I am running a cron job which will run at every 5 minutes.
Now Let's say i have started job on 04:02 so it will execute at every 5 minutes so will execute on 04:07, 04:12, 04:17 etc...
Let's say i have started job on 13:18 so it will executed at 13:23, 13:28, 13:33 etc...
But what i want is it should only execute in multiplication of 5 minutes means if i create job on 04:02, it should start executing from 04:05, 04:10 and so on.
And if start job on 13:18, it should start executing from 13:20, 13:25 and so on.
So how to achieve this?
Try this:
0,5,10,15,20,25,30,35,40,45,50,55 * * * * <Your command>
*/5 * * * *
this should be what you want .
Suppose, current time is 11:42 and i have setup one cron file to run at every 5 minutes.
Then this file will run at which time 11:47 or 11:45?
So basically i am trying to understand that how the cron timing is work?
Edit : it was ran at 11:45, but i don't know the reason behind it
Cron Configuration :
*/5 * * * * wget -O /dev/null http://XXX/index.php?r=controller/action
As you know, cron will run jobs at a specific time.
A cron job will not use the time it was started, only the configuration matters. This means a cron job set to every 5 minutes (like your */5 * * * *) will only ever run at times ending with 0 or 5 (eg: 12:00, 12:05, 12:10), regardless of the time you run it. This makes sense because we want to schedule a job for a specific time.
If you really need a job to run every 5 minutes, with an offset (eg: 11:42, 11:47, 11:52) you will have to give a list in the configuration.
instead of (*/5 * * * *) you would need to use:
(2,7,12,...,57 * * * *), filling ... with all the other numbers.
I'd like a cron job to run a command at:
8am
10am
5pm
7pm
9pm
11pm
I've tried this, but when I check my logs, I see that the command is run too many times.
* 8,10,17,19,21,23 * * * COMMAND >> mylog.txt
Your command means "run on every minute of the given hours". If you want to run it just once, you need to set the minute field, e.g.:
0 8,10,17,19,21,23 * * * COMMAND >> mylog.txt
This way the command only runs at the start (minute 0) of each of the given hours
I am attempting to schedule a cron job for database backups using percona extra backup.
My cron job is in cron.d and looks as follows;
exec &>/var/tmp/cron.log
1 * * * * * secondstory_prod /var/opt/backup/percona_xtrabackup_incremental.sh > /var/tmp/cron.log
The error i receive when i try and force the jobs to run in the log file listed above is /etc/cron.d/db_backup_daily: line 2: 1: command not found
If i try to run the jobs forcefully with run-parts /etc/cron.d i get the above error.
What is strange is that if i navigate to the directory and run the percona_xtrabackup_incremental.sh file it works with no issues.
Please can someone help?
Thanks
Your problem is you have one too many * in your cron entry.
1 * * * * * secondstory_prod ..stuff..
should be
1 * * * * secondstory_prod ..stuff..
will run on every 1st minute of each hour every day (above). The general time entry format is:
* minute (0-59)
* hour (0-23)
* day of month (1-31)
* month (1-12)
* day of week (0-6) (0=Sunday)