XK0-005 Question #53: Real Exam Question with Answer & Explanation

The correct answer is C: init 1. To transition a SysV init system into a safe maintenance state, which corresponds to runlevel 1 (single-user mode), both the init 1 and telinit 1 commands can be used.

System Management

Question

Which of the following commands brings a system running SysV init into a state in which it is safe to perform maintenance tasks? (Choose TWO correct answers.)

Options

Ashutdown -R 1 now
Bshutdown -single now
Cinit 1
Dtelinit 1
Erunlevel 1

Explanation

To transition a SysV init system into a safe maintenance state, which corresponds to runlevel 1 (single-user mode), both the init 1 and telinit 1 commands can be used.

Common mistakes.

A. shutdown -R 1 now is an incorrect syntax; shutdown -r now initiates a reboot, but shutdown -R 1 is not a valid way to enter runlevel 1 for maintenance.
B. shutdown -single now is not a standard or valid command for entering single-user mode in SysV init systems.
E. The runlevel command displays the current and previous runlevels, but it does not change the system's runlevel.

Concept tested. SysV init runlevels for maintenance

Reference. https://man7.org/linux/man-pages/man8/init.8.html

Topics

#SysV init#Runlevels#init command#System maintenance

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