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Question 260 - XK0-005 discussion

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An administrator needs to make an application change via a script that must be run only in console mode. Which of the following best represents the sequence the administrator should execute to accomplish this task?

A.
systemct1 isolate multi-user.target sh script.sh systemct1 isolate graphical.target
Answers
A.
systemct1 isolate multi-user.target sh script.sh systemct1 isolate graphical.target
B.
systemct1 isolate graphical.target sh script.sh systemct1 isolate multi-user.target
Answers
B.
systemct1 isolate graphical.target sh script.sh systemct1 isolate multi-user.target
C.
sh script.sh systemct1 isolate multi-user.target systemct1 isolate graphical.target
Answers
C.
sh script.sh systemct1 isolate multi-user.target systemct1 isolate graphical.target
D.
systemct1 isolate multi-user.target systemct1 isolate graphical.target sh script.sh
Answers
D.
systemct1 isolate multi-user.target systemct1 isolate graphical.target sh script.sh
Suggested answer: A

Explanation:

The correct answer is A. systemctl isolate multi-user.target sh script.sh systemctl isolate graphical.target

This sequence will allow the administrator to switch from the graphical mode to the console mode, run the script, and then switch back to the graphical mode.

The systemctl command is used to control the systemd system and service manager, which manages the boot targets and services on Linux systems. The isolate subcommand starts the unit specified on the command line and its dependencies and stops all others. The multi-user.target is a boot target that provides a text-based console login, while the graphical.target is a boot target that provides a graphical user interface. By using systemctl isolate, the administrator can change the boot target on the fly without rebooting the system.

The sh command is used to run a shell script, which is a file that contains a series of commands that can be executed by the shell. The script.sh is the name of the script that contains the application change that the administrator needs to make. By running sh script.sh, the administrator can execute the script in the console mode.

The other options are incorrect because:

B) systemctl isolate graphical.target sh script.sh systemctl isolate multi-user.target

This sequence will switch from the console mode to the graphical mode, run the script, and then switch back to the console mode. This is not what the administrator wants to do, as the script must be run only in console mode.

C) sh script.sh systemctl isolate multi-user.target systemctl isolate graphical.target

This sequence will run the script in the current mode, which may or may not be console mode, and then switch to console mode and back to graphical mode. This is not what the administrator wants to do, as the script must be run only in console mode.

D) systemctl isolate multi-user.target systemctl isolate graphical.target sh script.sh

This sequence will switch from graphical mode to console mode and then back to graphical mode, without running the script at all. This is not what the administrator wants to do, as the script must be run only in console mode.

systemctl(1) - Linux manual page

How to switch between the CLI and GUI on a Linux server

How to PROPERLY boot into single user mode in RHEL/CentOS 7/8

Changing Systemd Boot Target in Linux

Exit Desktop to Terminal in Ubuntu 19.10

asked 02/10/2024
Russell Ang
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