Cron - crontab
process started on boot
responsible for facilitating and managing cronjobs
crontab - a special file with formatting that is recognized by the cron process to execute each line step-by-step. They require 6 specific value
min - what minute to execute at
hour - what hour to execute at
dom - what day of the month to execute at
mon - what month of the year to execute at
dow - what day of the week to execute at
cmd - what command to execute
0 *12 * * * cp -R /home/cmnatic/Documents /var/backups
backup “cmnatic”'s “Documents” every 12 hours¶
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- wildcard for crontabs. If we don't wish to provide a value for a field or don't care what month, day, year it is execute... only that it is executed 12 hrs - use an *
Resources
Crontab generator https://crontab-generator.org/
Cron Guru https://crontab.guru/
$ crontab -e
- wildcard for crontabs. If we don't wish to provide a value for a field or don't care what month, day, year it is execute... only that it is executed 12 hrs - use an *