Magento – Magento 2 for cronjob

cronmagento2

This may sound like a dumb question but I really don't understand it. For example, Magento 2 has been saying to make sure "Magento cron job is running".

Create the cron job
To create a cron job as the Magento file system owner, enter the following command as a user with root privileges:
crontab -u <Magento file system owner user name> -e
Then write in the file:
"path-to-binary" -c "ini-file-path" "your Magento install dir"/bin/magento cron:run [>> "log-file"&]
"path-to-binary" -c "ini-file-path" "your Magento install dir"/update/cron.php [>> <log-file>&]
<path-to-binary> -c "ini-file-path" "your Magento install dir"/bin/magento setup:cron:run [>> "log-file"&]*

As I said before, this was an example because my problem is that I do not know where to write those commands. It always says to write this command or write the other, but I can't find where I am supposed to put them.

UPDATE:
I have access to cPanel to manage my server and use FTP to upload the files.

Best Answer

There is no place to "put" the crontab. You run the crontab command as root and cron starts running. You don't have to change to a directory but you do have to create cron as the correct user.

More info about cron

Related Solutions

Magento – Can someone give detailed explanation about scheduling in Magento 2 cron job

This can not be a complete answer to my question about detailed explanation of how Magento's cron schedule works and admin config parameters, but there are few notices:

System cron schedule must be more frequent then magento's cron job schedule. In other case it will skip tasks.
In case of above notice there is no need to include bin/magento cron:run command in system cron twice.
As for magento docs it's recomended to run default magento's cron tasks every minute.
There is also config for cron groups in admin panel in which there is a "Generate Schedules Every" parameter. It affects on cron job launch frequency (job can not launch more frequent than this parameter specifies). What for "Schedule Ahead For" it's a mystery for me for now.

Therefore, for example, if I set system cron to run every minute:

* * * * * /usr/bin/php /srv/www/my_directory/bin/magento cron:run

set up cron job (which is in default group) to run every 5 minutes:

> <group id="default">
>     <job name="my_custom_job" instance="My\Module\Cron\MyCustomJob" method="execute">
>         <schedule>*/5 * * * *</schedule>
>     </job>
> </group>

and in admin config panel leave default values ("Generate Schedules Every" 15 minutes),

than my cron job will run every 15 minutes (as admin config limits).

For more frequent launching I must create custom group with other parameters.

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