LPIC-1 Linux Installation and Package Management Practice Test 4 — 15 Questions

Question 1

A technician is tasked with installing a package from a third-party repository on a CentOS 7 system. What is the correct first step to add the repository?

Accepted Answer

Create a .repo file in /etc/yum.repos.d/.. On CentOS 7, third-party repositories are added by placing a .repo file in /etc/yum.repos.d/. This file defines the repository ID, name, baseurl, and GPG check settings. Yum reads all .repo files in this directory at runtime, making it the standard and correct first step for adding a repository.

Answer

Run 'yum localinstall' with the repository URL.

Answer

Edit /etc/yum.conf and add the repository URL.

Answer

Use 'yum-config-manager --add-repo' without any further steps.

Question 2

An RPM-based system reports a file conflict during package installation. Which option to the rpm command will allow the installation to overwrite files from another package?

Accepted Answer

--replacefiles. The --replacefiles option tells rpm to overwrite files that already exist on the system from a different package, resolving file conflicts during installation. This is the correct and targeted way to allow overwriting without bypassing other important checks.

Answer

--force

Answer

--nodeps

Answer

--justdb

Question 3

A sysadmin wants to prevent an APT package from being upgraded automatically but still allow it to be upgraded manually if needed. Which configuration method best achieves this?

Accepted Answer

Use 'apt-mark hold '. The `apt-mark hold ` command marks a package as held back, preventing it from being automatically upgraded during `apt upgrade` or `apt dist-upgrade`, while still allowing manual upgrades via `apt install ` or `apt-mark unhold`. This directly meets the requirement of blocking automatic upgrades but permitting manual intervention.

Answer

Set the package version to a non-existent version in /etc/apt/preferences

Answer

Add the package to /etc/apt/preferences with Pin-Priority: 1000

Answer

Remove the package from sources.list

Question 4

Which TWO commands are used to install packages on a Debian-based system? (Choose two.)

Accepted Answer

apt-get install. B is correct because `apt-get install` is the standard command-line tool for installing packages from Debian repositories, handling dependencies automatically. C is correct because `dpkg -i` installs a local `.deb` package file directly, though it does not resolve dependencies.

Answer

pacman -S

Answer

rpm -i

Answer

yum install

Question 5

Which TWO characteristics describe the difference between 'apt-get' and 'aptitude'? (Choose two.)

Accepted Answer

Aptitude offers a text-based interactive interface (TUI).. Aptitude includes a text-based interactive interface (TUI) that allows users to browse, search, and manage packages in a menu-driven environment, whereas apt-get is strictly command-line only. This TUI provides features like visual dependency trees and interactive conflict resolution, making aptitude more user-friendly for interactive package management.

Answer

Apt-get uses a different package format than aptitude.

Answer

Apt-get can only be used from the command line, while aptitude only has a text-based interface.

Answer

Aptitude is an older tool and no longer maintained.

Question 6

Which THREE are valid fields in a GRUB 2 configuration file (grub.cfg) generated by update-grub? (Choose three.)

Accepted Answer

set root. A is correct because 'set root' is a valid GRUB 2 command used in grub.cfg to specify the root device (e.g., 'set root=(hd0,msdos1)') from which GRUB loads kernel and initrd images. This directive is automatically generated by update-grub based on the system's partition layout.

Answer

password

Answer

chainloader

Question 7

Refer to the exhibit. Based on the dpkg output, what is the status of the 'ftp' package?

Accepted Answer

Removed but configuration files remain.. The 'dpkg' output shows 'rc' in the status field, which stands for 'removed' (the package has been deleted) but 'config-files' remain. This means the package was removed using 'dpkg --purge' or 'apt-get remove' without the '--purge' option, leaving behind configuration files in /etc.

Answer

Half-configured.

Answer

Installed and up-to-date.

Answer

Not installed at all.

Question 8

Refer to the exhibit. After modifying /etc/default/grub to enable serial console output, which command must be run to apply the changes to the GRUB configuration?

Accepted Answer

update-grub. The correct command is `update-grub` (or its equivalent `grub-mkconfig -o /boot/grub/grub.cfg`). After modifying `/etc/default/grub`, you must regenerate the GRUB configuration file (`grub.cfg`) to incorporate the new serial console settings. `update-grub` is a wrapper that runs `grub-mkconfig` and writes the output to the correct location, applying the changes.

Answer

grub-editenv

Answer

grub-install

Answer

grub-set-default

Question 9

A systems administrator downloads a .deb package file but it fails to install due to unmet dependencies. Which command sequence should be used to resolve the dependencies and complete the installation?

Accepted Answer

dpkg -i package.deb; apt-get install -f. When a .deb package fails to install due to unmet dependencies, `dpkg -i package.deb` installs the package but leaves dependencies unresolved. Running `apt-get install -f` (or `apt install -f`) then fixes broken dependencies by downloading and installing any missing packages from the configured repositories. This two-step sequence is the standard method for resolving dependency issues after a direct dpkg installation.

Answer

apt-get install -f

Answer

dpkg --configure -a

Answer

apt-get upgrade

Question 10

A system has multiple APT repositories configured. The administrator needs to ensure that for a specific package, the version from a particular repository is always preferred over others, regardless of version number. Which configuration would achieve this?

Accepted Answer

Creating a file in /etc/apt/preferences.d/ with a high Pin-Priority for that package and origin. APT's pinning mechanism, configured via files in /etc/apt/preferences.d/, allows an administrator to assign a high Pin-Priority to a specific package from a particular origin (repository). This ensures that version is always preferred during dependency resolution and upgrades, overriding the default version comparison logic.

Answer

Editing /etc/apt/sources.list and setting the release in sources.list

Answer

Using apt-mark hold on the package after installing from desired repository

Answer

Adding the repository and using apt-get install -t release package

Question 11

A Yellowdog Updater Modified (YUM) transaction that included several package installations and upgrades completed successfully, but a recent change caused a service to break. The administrator wants to revert the entire transaction using its transaction ID. Which command should be used?

Accepted Answer

yum history undo 123. `yum history undo 123` reverts the specific transaction identified by ID 123, reversing all changes (installs, upgrades, removals) made in that transaction while preserving the current state of other packages. This is the intended command for rolling back a single transaction without affecting subsequent transactions.

Answer

yum history redo 123

Answer

yum remove <packages>

Answer

yum history rollback 123

Question 12

An openSUSE administrator needs to add a new repository from a URL and refresh the package cache. Which command sequence accomplishes this?

Accepted Answer

zypper addrepo url; zypper refresh. `zypper addrepo url` adds a new repository from the specified URL, and `zypper refresh` updates the package cache to include metadata from all configured repositories. This two-step sequence is the standard method in openSUSE for adding a remote repository and making its packages available for installation.

Answer

zypper install --repo url

Answer

zypper modifyrepo --add url

Answer

zypper repos --add url

Question 13

Which command lists all installed packages on a Debian-based system by querying the dpkg database?

Accepted Answer

dpkg --get-selections. `dpkg --get-selections` queries the dpkg database directly and outputs a list of all installed packages along with their installation state (e.g., 'install'). This command does not rely on remote repositories or cache files, making it a reliable method for listing installed packages on a Debian-based system.

Answer

apt-cache search .

Answer

dpkg -L

Answer

apt-show-versions

Question 14

A Red Hat system administrator suspects that the files belonging to the 'openssh-server' package have been modified since installation. Which command verifies the integrity of the installed package files?

Accepted Answer

rpm -V openssh-server. The `rpm -V` (verify) command checks the integrity of installed package files by comparing their current attributes (size, MD5 checksum, permissions, etc.) against the original metadata stored in the RPM database. This directly answers the question of whether files belonging to the 'openssh-server' package have been modified since installation.

Answer

rpm -K openssh-server

Answer

rpm -qa | grep openssh

Answer

rpm -q openssh-server

Question 15

When troubleshooting a problem with a Debian package installation, an administrator wants to see which version of a package would be installed from the configured repositories. Which command displays the candidate version?

Accepted Answer

apt-cache policy package. The `apt-cache policy package` command displays the package's priority, the installed version (if any), and the candidate version (the version that would be installed by default from the configured repositories). This makes it the correct tool for determining which version will be installed from the repositories.

Answer

dpkg -l package

Answer

apt-show-versions package

Answer

apt-get -s install package