daemon

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daemon

[′dē·mən]
(computer science)
In Unix, a program that runs in the background, such as a server.

daemon

(operating system)
/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.

daemon

Pronounced "dee-mun" as in the word for devil, as well as "day-mun," a daemon is a Unix/Linux program that executes in the background ready to perform an operation when required. Functioning like an extension to the operating system, a daemon is usually an unattended process that is initiated at startup. Typical daemons are print spoolers and e-mail handlers or a scheduler that starts up another process at a designated time. The term comes from Greek mythology, meaning "guardian spirit." See agent and mailer-daemon.
References in periodicals archive ?
Clearly this barefoot, daimonic philosopher is meant, at some level, to call to mind Socrates himself; it seems to be an idealized portrait of Socratic philosophy, one which abstracts from what is merely human or contingent about Socrates the individual.
There Socrates claims that a certain daimonic sign has appeared to him from childhood, which when it comes always turns him away from something he is about to do but never urges him forward.
By contrast to both these accounts, in the Symposium Socrates himself is identified with the daimonic.
66) The contrast between their divergent dramatic contexts can suggest another way of formulating the distinction between the tyrannic, daimonic, and divine hypotheses as presented in the three dialogues under consideration, a way which makes more explicit the intimate relation between Plato's conception of human discursive activity and the polis.
When outer mediation broke down, inner, daimonic mediation took over, for better or for worse.
The word daimonic in the original Greek meant some division in consciousness through which 'divine' activity could be glimpsed--either for good or for evil.
17) So, through the earthquake fault of early trauma, an alternative world of daimonic inner 'Beings' comes into view-an encapsulated world in which 'pre-personal' and 'transpersonal' elements are intermingled and in which inner objects take on an 'uncanny' quality.
These primitive or archaic defenses against trauma "are personified as archetypal daimonic images.
Corinth is thus an appropriate setting for a story of sexual enchantment by a daimonic woman.
The descriptions of the daimon are the locus of the ambiguity: is the daimonic voice "immanentizing" and earthly, or is it estranging and otherwordly?
But this still leaves unexplained why Socrates would have need of a daimonic voice.
The indeterminate universal found in reason's first efforts to find the truth in itself necessarily lacks the power to give meaning to the contingent, and hence Socrates' need for a personal supplement to reason, the daimonic voice that responds to contingency.