Questions

Which TWO runlevels should never be declared as the default runlevel?

Which TWO runlevels should never be declared as the default runlevel?

A.
0

B.
3

C.
5

D.
6

Explanation:
From the man pages:
Runlevels 0, 1 and 6 are reserved. Runlevel 0 is used to halt the system and 6 to reboot the system. Runlevel 1 is used to bring the system back down into single-user mode.

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