As root on an AIX server a user ran a command "crontab" and pressed enter. As soon after he did this he did a "Ctrl z", This seems to have nulled the root crontab file. Is this possible, What is the explanation behind this.
I replicated the issue on a different server but root crontab entries were intact. So just by running "crontab" will this null the file, as I know that "crontab -e" does editing of crontab, "-e" option was not specified.