# /etc/crontab: system-wide crontab # Unlike any other crontab you don't have to run the `crontab' # command to install the new version when you edit this file # and files in /etc/cron.d. These files also have username fields, # that none of the other crontabs do.
We can use crontab to edit a user-defined crontab files under
/var/spool/cron/crontabs/, but can't use the same way to edit
/etc/crontab or files under
/etc/cron.d/. Are they supposed to be edited? If yes, how? Thanks.