For the user that owns the ITFlow files - crontab -e as them. The install script adds it for you.
Cron ran = escapeHtml(timeAgo($gs_cron_heard)) ?>.= $gs_cron_heard ? 'Cron last ran ' . escapeHtml(timeAgo($gs_cron_heard)) . ' - waiting to hear from it again' : 'Waiting to hear from it - this page checks every few seconds' ?>
Turn cron on
It ships off, so a copy of ITFlow never emails clients or charges cards by surprise. Every job stops itself while it is off.
On. Each job's schedule is in Maintenance > Cron.
Nothing is emailed or backed up until cron runs - the other steps can be done meanwhile.