LPIC-1 System Architecture Practice Question
A system administrator wants to disable the graphical target and boot to the text mode multi-user.target permanently. Which command should they run?
⚠ Common exam trap
Many candidates confuse runtime isolation (`isolate`) with persistent default setting (`set-default`), leading candidates to choose option B for a permanent change when it only affects the current session.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
systemctl set-default multi-user.target
`systemctl set-default multi-user.target` permanently changes the default systemd target to multi-user.target, ensuring the system boots into text mode (runlevel 3 equivalent) on every subsequent boot. This persists across reboots, unlike temporary switches.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
systemctl enable multi-user.target
Why it's wrong here
enable is used for services, not for setting default target.
- ✗
systemctl isolate multi-user.target
Why it's wrong here
isolate changes the current target immediately but does not persist across reboots.
- ✓
systemctl set-default multi-user.target
Why this is correct
This sets the default target for future boots.
- ✗
systemctl default multi-user.target
Why it's wrong here
This is not a valid systemctl command.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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