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 ?
I think the Daemons would be particularly good because they're a little bit black-magic-y," he added.
Daemons that had found no new copies of the files in more than an hour took notice of this new distribution.
This Oxford, however, is in a world parallel to ours where a person's soul - their daemon - lives out of their body in the form of an animal.
All of the technical heft is necessary to fully realise Pullman's fantastical parallel universe, in which humans are bound to a reflection of their soul called a daemon, which takes the form of an animal.
The daemons of children, such as Lyra's daemon Pantalaimon, change their shapes frequently.
Lyra's daemon is Pan, who in the book is part-conscience/part-friend but definitely acharacter in his own right.
And the girl and her daemon are soon embroiled in mystery when the enigmatic Mrs Coulter (Kidman) spirits Lyra away from Oxford to become her assistant.
However, the girl and her daemon are soon embroiled in mystery when the enigmatic Mrs Coulter (Kidman) spirits Lyra away from Oxford to become her assistant.
For young Lyra Belacqua, that daemon is the shape-shifting Pantalaimon (voiced by Highmore) and the pair overhear a confidential report by her globetrotting uncle Lord Asriel (Craig) on a substance called Dust.
However, all of the technical stuff is necessary to fully realise the fantastical parallel universe, in which humans are bound to a reflection of their soul called a daemon, which takes the form of an animal.
com, answer 20 questions, and you'll be allocated your very own daemon.
Jennifer Lawton, formerly the CEO of Net Daemons Associates, Inc.