CRONTAB(oh)			     LOCAL			   CRONTAB(oh)

crontab - config and usage.

OPTIONS
     -e	    : edit
     -l	    : list
     This applies to the user crontab, the system crontab is /etc/crontab.

CONFIGURATION
	   MINUTE HOUR DAY_OF_MONTH MONTH DAY_OF_WEEK COMMAND
     The fields MINUTE, HOUR, DAY, MONTH, DAY_OF_WEEK can have the following
     values:
     -	 Numeric: MINUTE (0-60), HOUR (0-23), DAY_OF_MONTh (1-31), MONTH
	 (1-12), DAY_OF_WEEK (0-6).
	       The week starts on Sunday with the value 0.
     -	 Asterisk: * means it executes every MINUTE, HOUR, DAY, MONTH,
	 DAY_OF_WEEK depending on the field where it is set.
     -	 Text: The first 3 letters of the name of the month or day of the
	 week. It is case-insensitive. MONTH (Jan-Dec), DAY_OF_WEEK (Sun-Sat).
     -	 Ranges: Example, using 15-30 for MINUTE will run every minute between
	 the minutes 15 and 30.
     -	 Lists: Values can be separated by comma, example: DAY_OF_WEEK Mon,Wed
	 to run on Mondays and Wednesdays.
     -	 Frequency: specified as /NUMBER, example: */10 will run every 10
	 minutes.
     -	 The options can be combined, example: MINUTE 15-30/5,45 will run
	 every 5 minutes between the minutes 15 and 30 and will also run at
	 minute 45.
     -	 The command can be a command or command chain.

   Example
	   15 5-10 * * 1 5 date > log
     This will output date to the file log Monday through Friday 15 minutes
     after the hour between 5am and 10am any day of the month all months.

IMPORTANT
   paths
     To ensure crontab can execute the command, use the full path of the
     command, which can be found using the command whereis , and full path for
     files and directories.
	   $ whereis date

     OpenBSD output
	    : /bin/date
     linux output
	    : date: /usr/bin/date /bin/date /usr/man/man1/date.1.gz
	   15 5-10 * * 1 5 /usr/bin/date > /home/user/log

   Variables
     Some environment variables may not be found, environment variables can be
     set at the beginning of the crontab file. Example:
     HOME=/home/user
     15 5-10 * * 1 5 /usr/bin/date > ${HOME}/log

SEE ALSO
     linux(oh) , command_line_intro(oh) , command_line(oh) , bash(oh)

     - OpenBSD manpages: crontab(1) , crontab(5)

AUTHORS
     ohazot(oh) | about(oh) | ohazot.com: https://ohazot.com
     <admin@ohazot.com>

OpenBSD 7.8 , linux |
		    Created:2026-03-27|Updated:2026-03-27|	   CRONTAB(oh)