LPIC-1 Linux Installation and Package Management Practice Question
An administrator added a new APT repository to sources.list. Which command must be run to make the system aware of the packages from that repository?
⚠ Common exam trap
A common mix-up: candidates confuse 'update' (refreshing package lists) with 'upgrade' (installing newer versions of installed packages), leading them to choose 'apt upgrade' or 'apt-get upgrade' thinking it will also fetch new repository data.
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
✓
apt update
After adding a new APT repository to sources.list, you must run 'apt update' (or 'apt-get update') to refresh the local package index from all configured repositories. This command downloads the latest package lists from the repository's Release and Packages files, making the system aware of available packages and their versions. Without this step, APT will not know about the new repository's packages, and subsequent install or upgrade commands will fail to find them.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
apt-get upgrade
Why it's wrong here
Same as apt upgrade.
- ✗
apt upgrade
Why it's wrong here
apt upgrade upgrades packages but does not update the package list.
- ✗
apt-cache search
Why it's wrong here
apt-cache search queries the cache but does not update it.
- ✓
apt update
Why this is correct
apt update synchronizes the package index files from sources.
Go deeper
Related to this question
About these practice questions
One of 527 original LPIC-1 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LPIC-1 practice question is part of Courseiva's free LPI certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the LPIC-1 exam.