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15 Cards in this Set
- Front
- Back
The process will be restarted whenever it terminates, (e.g. getty).
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respawn
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The process will be started once when the specified runlevel is entered and init will wait for its termination.
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wait
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The process will be executed once when the specified runlevel is entered.
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once
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The process will be executed during system boot. The runlevels field is ignored.
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boot
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The process will be executed during system boot, while init waits for its termination (e.g. /etc/rc). The runlevels field is ignored.
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bootwait
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This does absolutely nothing.
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off
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A process marked with an on demand runlevel will be executed whenever the specified ondemand runlevel is called. However, no runlevel change will occur (on demand runlevels are “a”, “b”, and “c”).
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ondemand
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This entry specifies the runlevel which should be entered after system boot. If none exists, init will ask for a runlevel on the console.
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initdefault
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The process will be executed during system boot. It will be executed before any boot or bootwait entries. The runlevels field is ignored.
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sysinit
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The process will be executed when the power goes down. init is usually informed about this by a process talking to a UPS connected to the computer. init will wait for the process to finish before continuing.
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powerwait
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The process will be executed when the power goes down, except that init does not wait for the process's completion.
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powerfail
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This process will be executed as soon as init is informed that the power has been restored.
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powerokwait
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This process will be executed when init is told that the battery of the external UPS is almost empty and the power is failing (provided that the external UPS and the monitoring process are able to detect this condition).
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powerfailnow
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The process will be executed when init receives the SIGINT signal. This means that someone on the system console has pressed the CTRL-ALT-DEL key combination. Typically one wants to execute some sort of shutdown either to get into single-user level or to reboot the machine.
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ctrlaltdel
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The process will be executed when init receives a signal from the keyboard handler that a special key combination was pressed on the console keyboard. Basically you want to map some keyboard combination to the “KeyboardSignal” action. For example, to map Alt-Uparrow for this purpose use the following in your keymaps file: alt keycode 103 = KeyboardSignal.
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kbdrequest
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