[{"data":1,"prerenderedAt":441},["ShallowReactive",2],{"tool-content-cron-parser":3},{"_path":4,"_dir":5,"_draft":6,"_partial":6,"_locale":7,"title":8,"description":7,"slug":9,"faqs":10,"body":32,"_type":434,"_id":435,"_source":436,"_file":437,"_stem":438,"_extension":439,"sitemap":440},"\u002Ftools\u002Fcron-parser","tools",false,"","Cron Parser","cron-parser",[11,14,17,20,23,26,29],{"q":12,"a":13},"What is a cron job?","A cron job is a scheduled task that runs automatically at specified intervals on Unix-like operating systems. The name comes from Chronos (the Greek god of time). Cron jobs are managed by a daemon called cron (or crond) that reads a configuration file called a crontab and executes commands at the scheduled times.",{"q":15,"a":16},"What do the five fields in a cron expression mean?","The five fields represent, from left to right — minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-7, where both 0 and 7 represent Sunday). For example, \"30 9 * * 1-5\" means \"at 9:30 AM, Monday through Friday\".",{"q":18,"a":19},"What does the * mean in cron?","An asterisk (*) means \"every\" — it matches all valid values for that field. \"* * * * *\" means \"every minute of every hour of every day\". You can think of * as a wildcard that says \"this field doesn't restrict when the job runs\".",{"q":21,"a":22},"What is the difference between *\u002F and a regular number in cron?","A regular number specifies an exact value — \"5 * * * *\" runs at minute 5 of every hour. The *\u002F syntax (called a step) means \"every N units\" — \"*\u002F5 * * * *\" runs every 5 minutes (0, 5, 10, 15... 55). \"*\u002F15 * * * *\" runs every 15 minutes.",{"q":24,"a":25},"Can I schedule a job to run every 30 seconds with cron?","Standard cron has a minimum resolution of 1 minute. To run a job more frequently than once per minute, you need a different tool — either a loop within your script with sleep, or a more advanced scheduler like systemd timers or a job queue system. For most use cases, 1-minute granularity is sufficient.",{"q":27,"a":28},"What is @reboot in cron?","Many cron implementations support shorthand expressions like @reboot (run once at startup), @daily or @midnight (run once a day at midnight), @weekly (once a week on Sunday), @monthly (once a month on the first), and @yearly or @annually (once a year on January 1). These are easier to read but not supported in all environments.",{"q":30,"a":31},"How do I edit my crontab on Linux\u002FMac?","Run \"crontab -e\" in your terminal to open your personal crontab file in your default editor. Use \"crontab -l\" to list current jobs. Use \"crontab -r\" to remove all jobs (careful — this deletes everything). System-wide cron jobs for root can be edited in \u002Fetc\u002Fcrontab or placed in \u002Fetc\u002Fcron.d\u002F.",{"type":33,"children":34,"toc":426},"root",[35,44,50,56,102,108,118,126,198,204,351,357,375,399,409],{"type":36,"tag":37,"props":38,"children":40},"element","h2",{"id":39},"what-is-a-cron-expression",[41],{"type":42,"value":43},"text","What is a cron expression?",{"type":36,"tag":45,"props":46,"children":47},"p",{},[48],{"type":42,"value":49},"A cron expression is a string of five (or sometimes six) fields that defines when a scheduled task should run. Cron is the standard Unix job scheduler, and cron expressions are its scheduling language. 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