What issues could arise while using blue.unix with programs such as cron, at, and calendar?
A10. Cron (and crontab) and at all put their files on the local file systems of the machine on which you issued the commands. If you use these programs, please make sure that you use same node of the cluster (i.e. node1, node2, etc.) whenever using these programs. Otherwise, you have their job files scattered among several different machines, which could damage your work as well as adversely affect the system when several machines try to issue the same commands simultaneously. The calendar program, however, reads a file named calendar into your home directory. If you use this program, you may receive more than one message if you have accounts on more than one machine. You will get a calendar message from each machine that can read your calendar file. If you set permissions so that only you can read the file, only a single message will be sent from www.people.virginia.edu.
