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Questions tagged [crontab]

Crontab is a short form of cron table. It is a configuration file that specifies shell commands to run periodically on a given schedule.

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Crontab doesn't apply the changes after editing it with crontab -e

In summary: I ran crontab -e, added a line, saved, said: crontab: installing new crontab, but running crontab -e just shows an old version of the file. Full explaination: Yesterday I added a line to ...
James T's user avatar
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Include hostname in crontab MAILFROM?

We have a lot of servers on RHEL8 & RHEL9 and would like to set something like this in crontab: [email protected] Problem is that HOSTNAME is not defined in the environment ...
Rop's user avatar
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Cron job does not execute according to time schedule

Consider the following cron job: * 22-23 * * * /usr/bin/curl -u username:paswword http://api.example.com/api/test2.php Now, according to this, the cron job must run every minute starting from 22h00 (...
Clint William Theron's user avatar
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What happens if I execute swapoff && swapon when RAM + swap exceeds RAM capacity

What happens if I execute the command sudo swapoff -a && swapon -a having RAM full 25GB/32GB and swap full 20GB/32GB? 25+20 = 45 > 32 so there's no way RAM can fit all operating data. On ...
banan3'14's user avatar
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Is that anyway to use with crontab with two commands such as shutdown and run script after reboot?

Is that anyway to use with crontab with two commands such as shutdown and run script after reboot? My entire command is not work. Only first command works: 22 16 * * * sudo shutdown -r 25 16 * * * @...
Aung Myo's user avatar
2 votes
1 answer
266 views

Within Docker, how to correctly add a task to cron programmatically (scripting)? no errors are perceived in log

After several days of messing around with Docker, I have not found a solution to my problem. In short, I have tried to add cron to php:8.1-apache-bullseye and pass it a file with the task that I want ...
Francisco IA Lover's user avatar
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OSX cronjob doesn't have permission to touch existing files in Downloads?

I recently updated from OSX 13.2 to 13.5.2 and all my cronjobs are failing now. I'm trying to run rsync in a cronjob but it keeps failing, and I ultimately narrowed that down to my cron jobs not ...
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how do I remove errant control characters from crontab

I edited my crontab and strangely started getting "error: bad minute". Searching around, I discovered the cause was errant control characters. I can see the character $ at the end of each ...
punkish's user avatar
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Running a "System Events" automation using crontab in MacOS

update - the crontab is running the binary, but nothing happens, no errors or any output. it's have the same behavior as if it has no permissions the change the system settings I want to execute dark-...
Meir Tolpin's user avatar
4 votes
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Where is crontab's time command documented?

I'm searching for the documentation of the time command that can be prepended to the script in crontab * * * * * time somescript.sh
wolfrevo's user avatar
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Can I specify a specific time with seconds with Linux crontab?

49 18 * * * mpv ~/Musik/Donau.mp3 This command would play the Donau.mp3 file at exactly 6:49pm. How could I, for example, specify 6:49:50pm?
Peter Andres's user avatar
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mount and systemctl not executing inside crontab

Under root, i run crontab -e and write : 0 21 * * * systemctl stop transmission-daemon && umount /mnt/WD5 && hdparm -y /dev/sda I also tried 0 21 * * * mount /mnt/WD5 None of them ...
Adrien's user avatar
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2 answers
1k views

Why is crontab not executing my .sh file?

I am completely and utterly confused at why crontab with not run this .sh file. I'm using a package called pushover notifications to send a notification to my phone. I've tried so many different ...
PapRedpaw's user avatar
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1 answer
130 views

How to pass keyword to background process to close properly?

I have just created a shell script and and added to crontab -e Crontab is working fine but when I kill process manually the recorded video of that process is not playable. Because when I run the ...
Farid's user avatar
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Crontab append a command to certain user using shell

I am trying to set up a cron job using a shell script but I am unable to find a solution to it I am trying to use crontab like this: #cron.sh echo "*/1**** /opt/file/test.sh" | crontab - I ...
Nilay Singh's user avatar
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I created a cronjob years ago, now it is still running on the server but I can't locate it with "crontab -e", what can I do?

two years ago I created a cronjob which execute a python script to backup stuff. Now, the thing is that this cronjob is still running: /var/log/cron.log.1:Oct 9 20:00:02 syslogngsrv CRON[28292]: (...
Elia Pirola's user avatar
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How execute EdgeOS crontab jobs

I have this in sudo crontab -l 0 17 * * 1-5 ipsec start 0 06 * * 1-5 ipsec stop The commands sudo ipsec start and sudo ipsec stop work splendidly. But the scheduled jobs are not executing. What else ...
theking2's user avatar
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Automating Borg Backup with cron fails

Background I would like to use Borg Backup as a backup solution (backup on remote server). Borg offer sa very convenient sh script that they say you can just run as a cron job. While the script works ...
cosmic-hobo's user avatar
2 votes
2 answers
10k views

How to properly use environment variables in crontab

I export a variable in my ~/.bashrc file (Ubuntu 20), which I'd like to use in a cron job. Searching for answers, I found two ways of doing it, but none worked for me: 12 11 * * * BASH_ENV=/home/l86/....
Leandro 86's user avatar
2 votes
2 answers
3k views

Ansible playbook runs from user, but not from crontab

I have a weird behavior on a crontab job I'm trying to run using Ansible's playbook. First of all, I have similar crontab's lines using Ansible playbooks that works perfectly, so the issue is either ...
leosilvapaiola's user avatar
2 votes
1 answer
2k views

Why is Cron not using local time?

0 11 * * * $HOME/.aws/killem > cron.log It looks valid to me but it is not running I've also tried 40 11 * * * /home/ec2-user/.aws/killem > cron.log but that doesn't work either This works: */...
Vietyank's user avatar
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Reload nginx configuration when rsync updates nginx.conf

I have two web servers, server1 and server2. On server2 there is an rsync command, scheduled in crontab, that updates /etc/nginx folder when I make some changes on server1: */5 * * * * rsync -avzhe ...
Atman's user avatar
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crontab -e: crontabs: No such file or directory

I am trying to set up a cron job in my user crontab on a debian 11 image on a VPS. But I have issues and cannot open crontab: flo@debian-2gb:~$ crontab -e crontabs: No such file or directory flo@...
Phil's user avatar
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2 votes
1 answer
292 views

Additional crontab stored in a git repository

I have an app that has some functionalities that are scheduled via crontab. Is there any way for me to keep these crontab-launched commands in a git repository, and at the same time add them to the ...
I hate Javascript's user avatar
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1 answer
125 views

Check if file crontab runs

I've set up crontab tasks to be executed every min. * * * * * sudo /usr/bin/php /root/scrapers/terra_plf/terra_swap_api.php I see its log in var/log/syslog file: Jan 3 15:14:01 clearthefog CRON[...
Igor Savinkin's user avatar
1 vote
0 answers
462 views

Unable to run Bash Script in Cronjob on Mac

Below script can execute from normal user but I can't able to run script through cronjob on macos(bigsur): Following error comes when script is executing through job security: ...
blaCkninJa's user avatar
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125 views

Crontab task does not work, Linux, Debian

At a Debian server I've set a crontab task using crontab -e with the following content: */2 * * * * /usr/bin/php /root/scrapers/terra_plf/terra_swap_api.php Why doesn't it work? When I run the same ...
Igor Savinkin's user avatar
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Cron files copied directly into /var/spool/cron/crontabs do not execute

Copying a crontab file directly into /var/spool/cron/crontabs/<username> does not schedule the job for execution. crontab -l shows the file contents, so cron is at least somewhat aware of it. ...
John Gordon's user avatar
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1 answer
395 views

Script works fine while execute, but won't run from cronjob

I have a script called "record.sh" It looks like: #!/bin/bash /usr/bin/vlc -vvv rtsp://admin:[email protected]:554/ch0_0.h264 --sout=file/ts:Videos/VideoCaptures/recording-$(date +"...
Neo's user avatar
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The rust file is not working as I `cargo run` with crontab

I type sudo -i to proceed to edit commands of crontab. I've written the following line inside the file of crontab. @reboot cd /home/username/superuser && cargo run; The following content is ...
electrical apprentice's user avatar
1 vote
1 answer
953 views

Script in crontab only partially executed

My scenario: I've some python scripts on a raspberry pi. They behave like a service, they run forever without exiting and process signals. They are meant to run in the background, writing some values ...
xph's user avatar
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2 answers
933 views

Speedtest-CLI Cron Job Not Working

Cron job is setup as: */15 * * * * speedtest >> /home/pi/speedtest.log The speedtest script is: #!/bin/sh speedtest-cli --csv >> /home/pi/speedtest.log That uses Speedtest-CLI. The job ...
mlw4428's user avatar
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1 vote
1 answer
1k views

Why did my default crontab editor change?

I have an Amazon Linux instance I have been using for years as a web server. It's been awhile since I've logged in. Today I logged in and noticed the default crontab editor has been changed from ...
ice13berg's user avatar
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1 vote
1 answer
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"/usr/sbin/shutdown now" not working in crontab in WSL in win10

Recently I started using win10 and WSL. I want to let crontab run the following command. /usr/sbin/shutdown now But it's not working even the command works in Linux OS (I checked it already). The ...
electrical apprentice's user avatar
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1 answer
863 views

Why isn't Crontab executing my script on reboot?

I have a script that launches my website located in /home/webserver/run-website #!/bin/bash echo "launching website..." service nginx start cd /home/webserver/django_personal_website ...
Kolby Wilson's user avatar
1 vote
1 answer
493 views

Trying to run a python script on startup on my raspberry pi

I've googled how to do this but I don't understand enough about linux to be able to interpret the answers. I ssh into my pi and log in using the user 'pi' and the password I set. Then I type sudo -s ...
NibblyPig's user avatar
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1 vote
1 answer
762 views

Failure to change my desktop background via crontab

I have a shell script called test.sh: #!/bin/sh touch /home/me/testing.txt /usr/bin/gsettings set org.gnome....
user1551817's user avatar
1 vote
1 answer
2k views

Crontab not logging to file

I have the following cronjob: @reboot /usr/local/bin/python3.9 /home/pi/push_bullet/push_bullet_socket.py >> /var/log/push_bullet_socket.py.log 2>&1 It's the only thing on my crontab. ...
Jacob's user avatar
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Python script using Crontab

I've written a python script that will check my roster for work (which is in google sheets), take some relevant details, place them in an email and send them to me. When I run this script manually ...
Colin's user avatar
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0 votes
2 answers
1k views

Run terminal command on boot using crontab

I have a server and on every boot, I have to enter npm run dev on the terminal so Node.js server starts. How do I use crontab to do it for me on every boot? I want something like this; @reboot echo &...
Yusuf Çağlar's user avatar
3 votes
1 answer
417 views

certbot-auto fails to install automatic renewal?

I am using kernel 3.10 on CentOS 7. I have successfully installed CertBot 1.10.1 using alternative installation instructions as certbot-auto. Running certbot-auto successfully generated certificates ...
Alex's user avatar
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1 answer
327 views

S3 command not working in cron

I have this ultra simple cron job: 48 20 * * * cd /home/pankaj;s3cmd -f get s3://myfile.gz The command works by itself. But the cron job does not. The cron job is created for the same user(pankaj) ...
kargirwar's user avatar
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1 vote
0 answers
2k views

Why can't I execute shell script via crontab?

I have this script shell1.sh ubicate in /home/documents/files, the script is for the creation of users on Linux, so it asks for some information and later creates the user. I want it to run for every ...
DDR's user avatar
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0 votes
1 answer
433 views

System crontab won't run for certain user on Centos 7

I have a super simple system crontab to run as a specific user. For a user that can login to a Gnome session it works fine. For another user that I use just for system tasks, it will not run. This is ...
Phil's user avatar
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0 answers
120 views

Unable to run a script through crontab in linux

When I try to run a script through crontab, it doesn't work. I don't see my script running when I run `ps aux. But it works perfectly when I run it manually. Any reason why it's not working? My script ...
Chinmaya Rath's user avatar
0 votes
2 answers
621 views

Crontab entry is not working

I want a set of files copied daily from a remote server to local machine at 5 am in the morning. The following crontab entry does not work: 0 5 * * * scp [email protected]:/tmp/bkp*tar.gz /home/...
asinix's user avatar
  • 105
1 vote
1 answer
807 views

How would I make a cron job stop and start again?

I am trying to make a cron job that stops at 12am today(friday) then start again Monday at 7am, what would the script for this look like, I am new to cron jobs.
MrPigbot's user avatar
2 votes
1 answer
7k views

How to log the output from an rsync backup which runs from a script using crontab?

I would like to log all the output that is generated by rsync; the output that I see when I run the script myself in terminal. I would prefer this logging to occur from within my script. Here is my ...
Bassam's user avatar
  • 23
2 votes
1 answer
3k views

How to test cron @reboot entry?

How can I test if @reboot is working without the need of reboot the machine? Is there anyway to force @reboot to entry to run? Thank you.
Augusto Will's user avatar
0 votes
1 answer
454 views

pacmd command run in local crontab does not work

I am trying to run certain commands at startup to allow my Audio to be FIFO Piped into a file. If i run the commands (either manually or in a script) it works fine. However when i put them in my local ...
AlmostSerious's user avatar

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