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| * crontab -e # edit cron for current user * crontab -l # list cron for current user |
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Contents
crontab
Cron is a time-based scheduling service in Linux / Unix-like computer operating systems.
Every ten minutes
*/10 * * * * /path/to/command
Every hour
0 * * * * /path/to/command
Every 2 hours
0 */2 * * * /path/to/command
Once a day at midnight
0 0 * * * /path/to/command
Once a day at eight am
0 8 * * * /path/to/command
Annotations
1 string meaning
2 ------ -------
3 @reboot Run once, at startup.
4 @yearly Run once a year, "0 0 1 1 *".
5 @annually (same as @yearly)
6 @monthly Run once a month, "0 0 1 * *".
7 @weekly Run once a week, "0 0 * * 0".
8 @daily Run once a day, "0 0 * * *".
9 @midnight (same as @daily)
10 @hourly Run once an hour, "0 * * * *".