This question already has answers here:
CronJob not running
(19 answers)
Closed 1 year ago.
i have problem with crontable in shell
I always write cronjob like this
0 * * * * /tmp/myscript
but now im on different shell and to use my script i need write like this
bash-4.2$ bash /tmp/myscript
And thats problem because when I write cronjob like this
* * * * * /tmp/myscript or bash /tmp/myscript ---> thats not work
How to solve this problem?
You must use this structure for Crontab:
* * * * * user-name command to be executed
By the way, first, you should rename myscript to myscript.sh and run it.
For example:
17 * * * * root bash /tmp/myscript.sh
Related
I made a script in TypeScript that download data from some api and store inside a mongo DB.
If i run yarn start from the app folder it works well.
I would like to put this command in a cron job that will be executed every 5 minutes.
I try it with some sintax in crontab but ti doesn't work.
I try to put the call in a run.sh script but it doesn't work too.
*/5 * * * * cd /opt/app-folder/src/ && /home/username/.nvm/versions/node/v16.15.1/bin/ts-node main.ts
*/5 * * * * cd /opt/app-folder && /usr/bin/yarn start > /home/username/app-name-out.txt
*/5 * * * * /home/username/run.sh > /home/username/app-name-out.txt
*/5 * * * * /home/username/.nvm/versions/node/v16.15.1/bin/ts-node /opt/app-folder/src/main.ts > /home/username/app-name-out.txt
*/5 * * * * cd /opt/app-folder/src/ && /home/username/.nvm/versions/node/v16.15.1/bin/ts-node main.ts > /home/username/app-name-out.txt
Can someone help me to execute the main.ts every 5 minutes?
Thanks
I get rid of this problem.
There was 2 problems, the first related to the output redirection.
I fixed by redirect stdout in a file and stderr in another one.
The second was related the the $PATH of crontab: it was /usr/bin:/bin.
To fix it I log into my user where script works and I print my $PATH with echo $PATH.
I copied the value and I set it before the crontab line in crontab file.
This is what it looks like:
# Set the same path of user username to have the correct path in script
PATH=/home/username/.nvm/versions/node/v16.15.1/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/snap/bin
# Execute oracle every 5 minutes
*/5 * * * * /bin/sh /home/username/run.sh >> /home/username/app-name-info.txt 2>> /home/username/app-name-error.txt
Now it works.
I have been researching this topic for the past two hours and can't find similar info. I am putting the last touch on a LED sign and I want it to run the script every x amount of minutes from raspberry to update the info going to the sign, lets just say every 10 minutes. I have tried everything with crontab -e and sudo crontab. my question is I have to run the file (mysign.py) from the directory in cd my_python and then from there I have to use the command sudo python3 mysign.py, it will not run with sudo python. I am wondering if this has anything to do with it?
here's some of what I have tried, along with the #reboot as well with nothing.
/10 * * * * /usr/bin/python mysign.py
/10 * * * * /usr/bin/python3 mysign.py
/10 * * * * /usr/bin/python /home/pi/my_python/mysign.py
/10 * * * * /home/pi/my_python/mysign.py
First of all, to execute on every 10th minute you need to use */10 ... not /10 ....
Second, entries from root's crontab execute as root, hence their home is not /home/pi - you actually need to specify the whole path for both the interpreter and the script:
*/10 * * * * /usr/bin/python3 /home/pi/my_python/mysign.py
Make sure you set it in the root's crontab (sudo crontab -e).
This, of course, assumes the location of your python3 interpreter and the script itself, if those paths are not correct - correct them before adding to crontab.
This question already has answers here:
How to do a cron job every 72 minutes
(7 answers)
Closed 6 years ago.
How to run cron every 245 minutes?
*/5 */4 * * * command - this variant is true?
Or need to run? */5 4 * * * command
The correct way is
5 */4 * * * command
That mean the job will run on minute: 5 of every 4 hours
Below is correct for Red Hat Based Linux( RHEL,Fedora,Centos etc. ) or maybe on Ubuntu too.
5 */4 * * * command.
But for Solaris Based Operating System, You can use below one :
5 0,4,8,12,16,20 * * * command
But this runs every 240 minutes.
As per your requirement its not possible with normal cron.
You can check the replacement of cron like the one given below:
https://mesos.github.io/chronos/
I am new to Linux and Ubuntu and I seldom have to use it. I am trying to make this PHP script to run every minute using cron, but firstly I wanted to make some tests.
I created an empty file at /var/www/html/ called test. I ran on terminal:
sudo crontab -e
And added this line:
0 * * * * rm /var/www/html/test
Then saved it and exited. It said "Installing new Crontab"
Nothing happened. Then I created a file bfile.sh that contained:
#!/bin/sh
rm /var/www/html/test
and added the following to crontab:
0 * * * * bash /var/www/html/bfile.sh
Still nothing happened.
What do I have to do to see anything happening from crontab? By the way I checked and the service is running
0 * * * * basically says "run this at 0th minute of every hour."
If you need cron to run your command every minute do * * * * *.
0 * * * * runs once every 1 hour. If you want to run every minute it should be */1 * * * *
You can also check the /var/log/cron file for any errors
I have added the following entry:
*/1 * * * * /home/coddict/myapp-dev/spoolemailsender
and the shell that I am trying to execute (the file spoolemailsender) has the following:
#!/bin/sh
php app/console swiftmailer:spool:send --env=dev
Why isn't this script running every 1 minute? Do I need another command to get this cron job running?
You forgot to put user to execute cron job:
*/1 * * * * root /home/coddict/myapp-dev/./spoolemailsender
or
*/1 * * * * root sh /home/coddict/myapp-dev/spoolemailsender
root for example.
Assuming spoolemailsender is executable script and you don't need to do ./spoolemailsender or sh spoolemailsender