Hyper Dictionary

English Dictionary Computer Dictionary Video Dictionary Thesaurus Dream Dictionary Medical Dictionary


Search Dictionary:  

Meaning of DAEMON

Pronunciation:  'deemun

 
Matching Terms:  daemoniac

Computing Dictionary
 
 Definition: 

/day'mn/ or /dee'mn/ (From the mythological meaning, later rationalised as the acronym "Disk And Execution MONitor") A program that is not invoked explicitly, but lies dormant waiting for some condition(s) to occur. The idea is that the perpetrator of the condition need not be aware that a daemon is lurking (though often a program will commit an action only because it knows that it will implicitly invoke a daemon).

For example, under its writing a file on the lpt spooler's directory would invoke the spooling daemon, which would then print the file. The advantage is that programs wanting files printed need neither compete for access to, nor understand any idiosyncrasies of, the lpt. They simply enter their implicit requests and let the daemon decide what to do with them. Daemons are usually spawned automatically by the system, and may either live forever or be regenerated at intervals.

unix systems run many daemons, chiefly to handle requests for services from other hosts on a network. Most of these are now started as required by a single real daemon, inetd, rather than running continuously. Examples are cron (local timed command execution), rshd (remote command execution), rlogind and telnetd (remote login), ftpd, nfsd (file transfer), lpd (printing).

Daemon and demon are often used interchangeably, but seem to have distinct connotations (see demon). The term "daemon" was introduced to computing by ctss people (who pronounced it /dee'mon/) and used it to refer to what its called a dragon.

[jargon file]

 
Thesaurus Terms
 
 Related Terms: afflatus, ancestral spirits, angel, attendant godling, atua, control, creative thought, creativity, daimonion, demon, divine afflatus, evil spirits, fairy godmother, familiar, familiar spirit, fire of genius, Geist, genius, genius domus, genius loci, good angel, good genius, guardian, guardian angel, guardian spirit, guide, household gods, inspiration, intelligence, invisible helper, lares and penates, lares compitales, lares familiaris, lares permarini, lares praestites, lares viales, manes, ministering angel, Muse, numen, penates, soul, special providence, specter, spirit, supernatural being, talent, totem, tutelar god, tutelary
 

 

 

 

COPYRIGHT © 2000-2013 HYPERDICTIONARY.COM HOME | ABOUT HYPERDICTIONARY