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138 IRIS WORKSTATION GUIDE
Version 1.0
Appendix I:
access by local users is allowed (e.g., links to overseas universities). If neither
of these files exist, uucp will be perfectly happy to forward for any system. As
an example, if the entry for system australia were in the ORIGFILE but not in
the FWDFILE on system mhtsa , it would mean that system australia would be
capable of forwarding jobs into the network via system mhtsa . However, no
system in the network could forward a job to australia via system mhtsa .
I.4 Administration
The role of the uucp administrator depends heavily on the amount of traffic
that enters or leaves a system and the quality of the connections that can be
made to and from that system. For the average system, only a modest amount
of traffic (100 to 200 files per day) pass through the system and little if any
intervention with the uucp automatic cleanup functions is necessary. Systems
that pass large numbers of files (200 to 10,000) may require more attention
when problems occur. The following parts describe the routine administrative
tasks that must be performed by the administrator or are automatically
performed by the uucp package. The section on problems describes the most
frequent problems and how to effectively deal with them.
Cleanup
The biggest problem in a dialup network like uucp is dealing with the backlog
of jobs that cannot be transmitted to other systems. The following cleanup
activities should be routinely perfonned by shell scripts started from cron (1).
Cleanup of Undeliverable Jobs
The uudemon.day procedure usually contains an invocation of the uuclean
command to purge any jobs that are older than some fixed time (usually 72
hours). A similar procedure is usually used to purge any lock or status files.
An example invocation of uuclean (1M) to remove both job files and old status
files every 48 hours is:
/usr/lib/uucp/uuclean -pST -pC -n48
Cleanup of the Public Area
In order to keep the local file system from overflowing when files are sent to
the public area, the uudemon.day procedure is usually set up with a find
command to remove any files that are older than 7 days. This interval may
need to be shortened if there is not sufficient space to devote to the public
area.