12/2/2023 0 Comments Automated folder backup linux![]() This practice, while rare, does exist in some instances. In other words, the image currently illustrates a crontab entry for a script that will run every minute of every day. An asterisk ( *) means every or all, as in every minute or all hours, every day, and so on. ![]() "Cron Job" by xmodulo is licensed under CC BY 2.0 Making it workĪs you can see from the image, the positioning of your entries has meaning, and the entries are separated by spaces. Each user has only one crontab file and you add all tasks to it. Note: There is no file name or designation of any kind required when creating a crontab entry. To create one, I need to edit my crontab file: $ crontab -e To see a list of your configured cron tasks, use: $ crontab -l You can issue the man crontab command to see all possible options, but there are generally two that work for most users: -l (list) and -e (edit). The same is true for any user on the system, including the root user. In other words, if you create a cron task, it runs with your user account's permissions. ![]() The task runs under the user account from which it was created. Any user may schedule cron tasks or jobs on a system. The crontab file is a simple text file that instructs the cron daemon to perform a task at a certain time or interval. The user command to work with the cron service is crontab (cron table). The cron daemon ( crond) is a system-managed executable that runs in memory with which users may schedule tasks. It might surprise the saltiest of system administrators to know that there is no Linux cron command.
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