Questions tagged [cron]
Cron is a job scheduler that allows users to run commands periodically.
2,392 questions
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How to handle crontab across multiple users on the same virtual machine?
Me and my team are working on a RHEL virtual machine and we were wondering how to handle the same crontabs from multiple users.
When one of the users does set a crontab no one but the user itself can ...
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Why does crontab use an unexpected editor?
man crontab reads:
The -e option is used to edit the current crontab using the editor specified by the VISUAL or EDITOR environment variables. After you exit from the editor, the modified crontab ...
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Permission denied with crontab -e program
I would like to run a custom script on startup. I added the script to my root crontab via sudo crontab -e and adding @reboot /path/to/my_custom_script.sh to the end. I made sure my_custom_script.sh ...
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Cron shutdown behavior in AWS
I'm just trying to understand the behavior I'm seeing. I tried adding this line to my AWS EC2's (root) crontab:
00 00 * * * shutdown -h now
But this never executed. When I added this to my own ec2-...
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job started by BusyBox crond doesn't complete
I need a script to run daily in an Alpine docker container.
I have set it up as follows:
copy the script to /etc/periodic/daily
start the crond daemon in the container's ENTRYPOINT script: /usr/sbin/...
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Systemd service to keep a fixed number of the same script running
I have been developing a task based system recently for a PHP project, which consists of tasks stored in a SQL database (MariaDB) for a queue, and a task worker PHP script to go through the queue and ...
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On my Ubuntu-based distro (Linux Lite), how to auto delete all network connections, disable Wi-Fi and networking as part of booting process?
My end goal here is to have no saved network connections, no enabled Wi-Fi or networking each time I boot up my computer, so that I have to go through a sequence of steps in order to access internet. ...
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Linux command does not run from crontab, but it runs fine from the Linux shell [duplicate]
I set up the following cron job to check every minute if port 8088 is listening. If it isn't, the CLI should write the message
Thu Jul 3 12:50:09 UTC 2025 bad
to the log file /tmp/crob_log.
Here is ...
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Alpine linux (LXC) not running cron jobs
I have been trying for a long to make the crontab entries to run, but it doesn't matter what Time / schedule I enter, it doesn't seem to work. I have confirmed my current time zone with date command &...
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cron every thirty minutes from 13:00 to 17:00 seems easy, but the obvious entry also runs it at 17:30
cronie 1.5.2 on RHEL 8.10
This entry runs foobar every 30 minutes from 13:00 to 17:30.
*/30 13-17 * * 1-5 foobar.sh
Is there some clever (but not hackish, like adding "exit if it's 17:30&...
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Merge two different times in cron format
I want to combine two different times which are in cron format into single time in bash shell script:
e.g.
time1 = 15 03 * * 1-5
time2 = 15 03 * * 6
result should be
15 03 * * 1-6
or
e.g.
time1 = ...
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Executing a cron task once a month at a random date and time
Ubuntu 22.04 or AlmaLinux 9.5
I've seen a lot of questions about running scripts in random times during a day using bash's $RANDOM but a month exceeds the limit it has.
How can I do that?
It is a xdg-...
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How does one run cron jobs in one container that does stuff in another?
I am on Kubernetes. I need to be able to write and run cron jobs in a pod. I can't use the CronJob workload. The solution I found is to run cron jobs from a cron sidecar container. I write cron jobs ...
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"rm -f" e-mails me an error, how do I prevent that?
I have cron "clean up" some stuff overnight. A simple rm -f thisandthat.
But if there is no file thisandthat, rm -f sends an e-mail to me at [email protected] - No such file or directory.
I ...
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Dbus issue when trying to run Wayland session
My distro is based on Slackware, therefore it doesn't have systemd, but SysVinit + elogind. I'm trying to use LightDM to initiliaze my desktop environment sessions, but I have either dbus services ...
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