Run this command to edit your cronjobs:
crontab -e
And a crontab file can look like this:
# min hour day month dayofweek command
15 * * * * /home/jarmund/crons/somescript.php
If you need to run more than one command, just add a new line in the similar format below. * means "all" as usual, in other words, the entry above runs /home/jarmund/crons/somescript.php "15 minutes past, all hours, all days, all months, all weekdays". To store it, just save and exit to the temporary filename that was suggested. NB: The example above assumes that the php script you want to run has the path to its interpreter set in it. If not, you need to include that in the command, such as with:
/usr/bin/php /home/jarmund/crons/somescript.php
crontab -e takes you to whichever editor is set in your shell. If you don't want to use your default one for whatever reason, just:
export EDITOR=nano
...for example, beforehand. Assuming you use bash, that is.
