Edit 2015/4/8: You also want to read this article from Mattias on preventing cronjobs to overlap.
Edit 2015/3/18: Check this article on how to install drush via composer, which is currently the preferred way to install.
This is the best way to run your Drupal 7 drush cron command from crontab:
# Run cron every 15 minutes, quiet */15 * * * * drush --quiet --root=$HOME/htdocs --uri=http://www.example.org cron # --quiet means there is no output, so no mail every time cron runs # --root is a nicer way than first do a "cd $dir; drush cron" # --uri is needed so certain modules (like xmlsitemap and media) # don't generate urls like http://default/ but use the full # site url http://www.example.org
A more extensive cron with a custom SHELL, PATH and MAILTO would be:
# If there is output, mail it to this address MAILTOfirstname.lastname@example.org # Add more paths PATH=$PATH:$HOME/.extra/bin # Make sure we are using bash as shell (or any other shell) SHELL=/bin/bash # Run cron every 15 minutes, quiet */15 * * * * drush --quiet --root=$HOME/htdocs --uri=http://www.example.org cron # Run an import every night, output goes to MAILTO 0 2 * * * drush --root=$HOME/htdocs --uri=http://www.example.org run-import