crontab format

gistfile1.txt

# crontab format
# * * * * * command to be execute
# | | | | +---- day of week (0 - 6) (Sunday = 0 or 7) or sun, mon, ..., sat
# | | | +------ month (1 - 12) or jan, feb, ..., dec
# | | +-------- day of month (1 - 31)
# | +---------- hour (0 - 23)
# +------------ minute (0 - 59)
# special string
# string     meaning
# ------     -------
# @reboot    Run once, at startup.
# @yearly    Run once a year, "0 0 1 1 *".
# @annually  (same as @yearly)
# @monthly   Run once a month, "0 0 1 * *".
# @weekly    Run once a week, "0 0 * * 0".
# @daily     Run once a day, "0 0 * * *".
# @midnight  (same as @daily)
# @hourly    Run once an hour, "0 * * * *".
# see also man 5 crontab