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systemd is the first daemon to start during booting and the last daemon to terminate during shutdown. The systemd daemon serves as the root of the user space's process tree; the first process (PID 1) has a special role on Unix systems, as it replaces the parent of a process when the original parent terminates. Therefore, the first process is ...
Commons Daemon, formerly known as JSVC, is a Java software library belonging to the Apache Commons Project. Daemon provides a portable means of starting and stopping a Java Virtual Machine (JVM) that is running server-side applications. Such applications often have additional requirements compared to client-side applications.
The /etc/inittab file sets the default runlevel with the :initdefault: entry. On Unix systems, changing the runlevel is achieved by starting only the missing services (as each level defines only those that are started / stopped). [citation needed] For example, changing a system from runlevel 3 to 4 might only start the local X server. Going ...
In a Linux system, for example, the watchdog daemon could attempt to perform a software-initiated restart, which can be preferable to a hardware reset as the file systems will be safely unmounted and fault information will be logged. It is essential, however, to have the insurance provided by a hardware timer, since a software restart can fail ...
Services FTP requests from a remote system. httpd: Web server daemon. inetd [4] Listens for network connection requests. If a request is accepted, it can launch a background daemon to handle the request, was known as the super server for this reason. Some systems use the replacement command xinetd. lpd: The line printer daemon that manages ...
The term was coined by the programmers at MIT's Project MAC.According to Fernando J. Corbató, who worked on Project MAC around 1963, his team was the first to use the term daemon, inspired by Maxwell's demon, an imaginary agent in physics and thermodynamics that helped to sort molecules, stating, "We fancifully began to use the word daemon to describe background processes that worked ...
When you get a message from a "MAILER-DAEMON" or a "Mail Delivery Subsystem" with a subject similar to "Failed Delivery," this means that an email you sent was undeliverable and has been bounced back to you. These messages are sent automatically and often include the reason for the delivery failure.
Configuration files define the parameters of services run by launchd. Stored in the LaunchAgents and LaunchDaemons subdirectories of the Library folders, the property list-based files have approximately thirty different keys that can be set. launchd itself has no knowledge of these configuration files or any ability to read them - that is the ...