LON Host ID ("Machine Name") 
is an internal ID within the LON-CAPA network used to specify
the uniqueness of a particular LON-CAPA server.

LON System Administrator E-Mail
specifies the e-mail address of an institutional member
responsible for direct upkeep of this server.

LON Domain ("Domain Name")
is a unique internal identifier within the LON-CAPA network
specific to the home institution;
A LON-CAPA domain is a collection of load-balancing institutional
machines forming a cluster of LON-CAPA servers. It has nothing to
do with the many other meanings for the word "domain", such as
"domain names" like "loncapa.org", or Windows file server domains.
If you are installing a LON-CAPA server for testing purposes,
it is safe to create your own domain name for testing. You should
ask the person running a real domain before adding your computer
to their domain.

LON Load Limit ("Server Load")
specifies a threshold of activity within The LearningOnline
Network that this machine should provide.  We strongly recommend
a value of 2.00.  Depending on processor architecture (dual processor),
this value may be increased, but there is no readily available
measure in this regard.

Cache Expiration Time
indicates, in seconds, how long distributed resources should be
held in the server's cache when not being accessed by students,
instructors, or any other class of user.