LPIC-1 Administrative Tasks Practice Question
An administrator ran 'dnf update' and a critical application broke. The administrator wants to undo the last transaction and return to previous state. Which command should be used?
⚠ Common exam trap
It's easy for candidates to confuse 'undo' with 'rollback' or assume DNF uses the same syntax as YUM, leading them to pick 'dnf rollback' or 'yum rollback' instead of the correct 'dnf history undo last'.
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
✓
dnf history undo last
The correct command is 'dnf history undo last' because DNF maintains a transaction history that can be reverted. The 'undo' subcommand reverses the specified transaction (in this case, the last one) by applying the inverse operations, restoring packages to their previous state. This is the standard way to roll back a DNF transaction without affecting unrelated changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
dnf undo last
Why it's wrong here
Invalid syntax.
- ✗
dnf rollback
Why it's wrong here
Not a valid dnf command.
- ✗
yum rollback
Why it's wrong here
yum may not be available; also incorrect command.
- ✓
dnf history undo last
Why this is correct
Correct: undoes the last transaction.
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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.