I am new to cron jobs and have set up one in Plesk to execute every minute however I am not sure if the command is correct due to it not working.
curl http://www.yourdomain.com/twitter_cron.php
I am running on a Centos VPS - the problem is I am not sure if I need a specific root to curl.
sgeorge-mn:~ sgeorge$ which curl
/usr/bin/curl
You need to use full path in cron for curl; otherwise you need to have proper PATH variable specified in crontab
So for example:
* * * * * /usr/bin/curl http://www.yourdomain.com/twitter_cron.php
Related
I've modified the crontab with:
sudo crontab -e
and added a cron for a script to run every minute so I can test if it works:
1 * * * * /scripts/backup-script.sh > /scripts/backup-script.logs
Afterwards, I tried to restart the cron service to restart the server but the cron doesn't seem to be working, I tried to use:
crontab -l
and it appears to have the old content as if I didnt even modify it. However, going into crontab -e does show the updated content.
To make your script run every minute your cron record must be:
* * * * * /scripts/backup-script.sh > /scripts/backup-script.logs
What you enter will run every 1st minute every hour
And if you add record via crontab command you do not need to touch cron daemon
To see the cron record you add with sudo crontab -e you must check it with command sudo crontab -l. Otherwise you list cron record of different user
I have currently running python script on debian system. Now because of some reasons I changed this script and updated cron, but nothing has changed. Also, I tried to save this cron in different file and create new cron - line with job appears, but script doesn't work.
CRON[22310] (root) CMD ( /usr/bin/python /home/radmin/test/test.py)
from /etc/crontab for new script:
*/1 * * * * root /usr/bin/python /home/radmin/test/test.py
for old script:
*/1 * * * * root python /home/radmin/base.py
Script runs correctly without cron.
Tried restarting and reloading cron.
It looks like cron dosen't recognize the root command you add.
try instead opening cron using sudo crontab -e and then add your code:
*/1 * * * * /usr/bin/python /home/radmin/test/test.py
by opening it up with sudo it will add it to the root user cron jobs.
Problem was in python code. Crontab is okay. I'm using python lib "requests" and there is a method to get post request content - ".text", so this method doesn't want to work in cron (empty error logs while running) (still don't know why). So changing .text to .content solved this issue.
I want to run rsync(in remote linux system) automatically in every minute. so whatever the changes (in test.txt, as mentioned below) are done in one system, it should be affected in another system at the same minute interval.
For this purpose, I have changed in sudo crontab -e , and added
*/1 * * * * /home/john/rsync.sh
rsync.sh contains two commands:
sudo rsync -av /home/john1/test.txt remote#remote_ip:
sudo rsync -av --update /home/john1/test.txt remote#remote_ip:
when I am running rsync.sh manually, all the changes are affected successfully.
If you added this in the root crontab, you don't need to start the rsync commands with sudo.
Things that run in crontab will probably not have the same environment variables. You can add the absolute path to rsync if you're unsure, for example /usr/bin/rsync. Also check other environment variables, for example running set.
When you run it manually, you're already in a specific shell which is probably able to run it. But when cron runs it, it doesn't know which interpreter to use. Always start your scripts with #!/usr/bin/bash (or whatever is your favorite shell). And/or call your cron job specifying which shell to use, for example:
*/1 * * * * /bin/bash /home/john/rsync.sh
I hope this helps. ;)
I ran a cron job as ec2 user, in AWS server.
I set the cron command, like this
*/5 * * * * ec2-user bash ./dailyMailSend.sh
in crontab -e file.
It was set to run after every 5 minutes. But it runs every minute. Don't know why ?
For Amazon Linux use "0/5" instead of "*/5". This expression means every 5th minute from 0 through 59.
Next, do not specify relative paths in your crontab. Use only absolute paths.
I'm trying to run a command by cron in Raspbian.
If I run ./sec_cam.sh, than my script runs, If I try to run it via crontab every 5 min, than nothing happens.
crontab -e shows me the followings:
*/5 * * * * ./sec_cam.sh
Did I configure the crontab wrong?
Thx in advance
scripts started from a cronjob are not setup with your usual environment, especially not with your current working directory (referenced by the . in ./sec_cam.sh). so to make this work you should specify a full path name like /home/user/sec_cam.sh