Stay Hungry: Cron Job

// Not Recommended: Opens cron job list for current logged in user [Not recommended, very hard to manage]

crontab -e

// Add this line to cron job file (Run a job every 5 minutes - run by current logged in user)

*/5 * * * * /path/to/script-or-program >> log_file.txt

// Recommended : Open cron job list for root

vim /etc/crontab

// Specify a user to run the cron job can be root, user_a, user_b

*/5 * * * * <user> /path/to/script-or-program >> log_file.txt

// Check whether cron job has run or not

sudo vim /var/log/syslog

// or

sudo grep "your_cron_job.php" /var/log/syslog

https://www.inmotionhosting.com/support/website/cron-jobs/did-cron-job-run

# m h dom mon dow user command

│17 * * * * root cd / && run-parts --report /etc/cron.hourly

│25 6 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )

│47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )

│52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )

when you scheduled cron job make sure to schedule after these time, or else cant see log

 +---------------- minute (0 - 59)
 |  +------------- hour (0 - 23)
 |  |  +---------- day of month (1 - 31)
 |  |  |  +------- month (1 - 12)
 |  |  |  |  +---- day of week (0 - 6) (Sunday=0 or 7)
 |  |  |  |  |
 *  *  *  *  *  command to be executed