Usually, the "crontab" command will put you into the 'vi' editor. You enter "insert mode" by pressing "i", then type in the line as above, then exit insert mode by - pressing ESC. You save and exit by typing ":wq", or quit with saving using ":q!" (without the quotes).
+ pressing ESC. You save and exit by typing ":wq", or quit without saving using ":q!" (without the quotes).On Windows systems: The simplest way is to use this little package moodle-cron-for-windows.zip which makes this whole thing very easy. You can also explore using the built-in Windows feature for "Scheduled Tasks".