LPIC-1 Linux Installation and Package Management Practice Question
This LPIC-1 practice question tests your understanding of linux installation and package management. Compare every option against the stated constraints before choosing — the best answer satisfies all requirements, not just the most obvious one. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Exhibit
ii adduser 3.118 all Add and remove users and groups
ii apt 2.0.9 amd64 commandline package manager
ii base-files 11 amd64 Debian base system miscellaneous files
ii base-passwd 3.5.47 amd64 Debian base system master password and group files
ii bash 5.0-6 amd64 GNU Bourne Again SHell
Refer to the exhibit. The system administrator wants to determine which package provides the file /etc/passwd. Based on the output, which command would be most appropriate to find the package?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
ii adduser 3.118 all Add and remove users and groups
ii apt 2.0.9 amd64 commandline package manager
ii base-files 11 amd64 Debian base system miscellaneous files
ii base-passwd 3.5.47 amd64 Debian base system master password and group files
ii bash 5.0-6 amd64 GNU Bourne Again SHell
A
`dpkg -L base-passwd`
Why wrong: Lists files of a known package, not the reverse.
B
`apt-file search /etc/passwd`
Why wrong: Requires apt-file to be installed; not immediate.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
`dpkg -S /etc/passwd`
`dpkg -S /path` searches the installed packages for ownership of the file. `apt-file search` can also do this but is not installed by default. `dpkg -L` lists files in a package, not the reverse. `apt-cache show` shows package info, not file ownership.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
`dpkg -L base-passwd`
Why it's wrong here
Lists files of a known package, not the reverse.
✗
`apt-file search /etc/passwd`
Why it's wrong here
Requires apt-file to be installed; not immediate.
✓
`dpkg -S /etc/passwd`
Why this is correct
Searches for the package that owns the file.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
`apt-cache show /etc/passwd`
Why it's wrong here
Cannot search for files.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related LPIC-1 NAT questions on configuration and troubleshooting.
Linux Installation and Package Management — This question tests Linux Installation and Package Management — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: `dpkg -S /etc/passwd` — `dpkg -S /path` searches the installed packages for ownership of the file. `apt-file search` can also do this but is not installed by default. `dpkg -L` lists files in a package, not the reverse. `apt-cache show` shows package info, not file ownership.
What should I do if I get this LPIC-1 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related LPIC-1 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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