My RHEL has the following anacrontab config file, it has START_HOURS_RANGE and RANDOM_DELAY both missing, what hour does cron.daily start everyday? My guess is it is random. Is it true? # /etc/anacrontab: configuration file for anacron # See anacron(8) and anacrontab(5) for details. SHELL=/bin/sh PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=root 1 65 cron.daily run-parts /etc/cron.daily 7 70 cron.weekly run-parts /etc/cron.weekly 30 75 cron.monthly run-parts /etc/cron.monthly