Home » Questions » Computers [ Ask a new question ]

How to setup a crontab to execute at specific time

How to setup a crontab to execute at specific time

"How can I set up my crontab to execute X script at 11:59PM every day without emailing me or creating any logs?

Right now my crontab looks something like this

@daily /path/to/script.sh"

Asked by: Guest | Views: 38
Total answers/comments: 3
Guest [Entry]

"When you do crontab -e, try this:

59 23 * * * /usr/sbin/myscript > /dev/null

That means: At 59 Minutes and 23 Hours on every day (*) on every month on every weekday, execute myscript.

See man crontab for some more info and examples."
Guest [Entry]

"Following up on svrist's answer, depending on your shell, the 2>&1 should go after > /dev/null or you will still see the output from stderr.

The following will silence both stdout and stderr:

59 23 * * * /usr/sbin/myscript > /dev/null 2>&1

The following silences stdout, but stderr will still appear (via stdout):

59 23 * * * /usr/sbin/myscript 2>&1 > /dev/null

The Advanced Bash Scripting Guide's chapter on IO redirection is a good reference--search for 2>&1 to see a couple of examples."
Guest [Entry]

"You will with the above response receive email with any text written to stderr. Some people redirect that away too, and make sure that the script writes a log instead.

... 2>&1 ...."