LPIC-1 Linux Installation and Package Management Practice Test 3 — 15 Questions

Question 1

An administrator is managing a Debian-based server and needs to perform package management tasks. Which TWO of the following commands are used to update the package index from the repositories and then upgrade all installed packages to their latest versions? (Choose two.)

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

apt-get update. The standard procedure to update the package index and upgrade all installed packages on Debian-based systems is to run apt-get update followed by apt-get upgrade. The update command refreshes the local index, and upgrade applies the latest versions of installed packages.

Answer

apt-cache update

Answer

apt-get dist-upgrade

Answer

dpkg --update

Question 2

A system administrator is configuring a CentOS 7 server that must use only packages signed by the company's internal GPG key. The administrator has imported the public key into the RPM database. Which TWO of the following statements are true regarding RPM package signature verification? (Choose two.)

Accepted Answer

The command rpm --checksig package.rpm verifies the GPG signature and displays 'OK' if the signature is valid and the key is trusted.. RPM signature verification relies on imported public keys stored in the RPM database. The rpm --checksig command validates a package file's signature against those keys, and rpm --import adds a new key to the database. These two operations are fundamental for ensuring package authenticity. Verification of installed files uses rpm -V, and key listing uses rpm -q gpg-pubkey, not --whatprovides.

Answer

The command rpm -V package.rpm verifies the GPG signature of the package file before installation.

Answer

When installing a package with rpm -i, if the GPG key is not imported, RPM will automatically download it from the package's embedded key URL.

Answer

The command rpm -q --whatprovides gpg-pubkey lists all imported GPG public keys in the RPM database.

Question 3

A system administrator needs to install the latest version of a package named 'webapp' from a third-party repository that has been added to the system. Which command should be used to update the package list and install the package in one step?

Accepted Answer

apt-get update && apt-get install webapp. It first runs `apt-get update` to refresh the local package index from all configured repositories (including the third-party one), then uses `&&` to conditionally execute `apt-get install webapp` only if the update succeeds. This ensures the latest version available from the third-party repository is fetched and installed in a single command sequence.

Answer

apt-get upgrade webapp

Answer

dpkg -i webapp.deb

Answer

apt-cache search webapp && apt-get install webapp

Question 4

A Linux administrator is troubleshooting a package dependency issue. When attempting to install package 'foo', the package manager reports a missing dependency 'libbar.so.2'. Which of the following is the most appropriate next step?

Accepted Answer

Use 'apt-file search libbar.so.2' or 'dnf provides libbar.so.2' to find the package that contains the file. The error indicates that the file 'libbar.so.2' is missing from the system. The most appropriate next step is to identify which package provides this file, so that it can be installed to satisfy the dependency. On Debian-based systems, 'apt-file search' queries the package repository metadata to find the package containing a specific file; on Red Hat-based systems, 'dnf provides' performs the same function. This targeted search is the correct first troubleshooting step before any installation or library cache update.

Answer

Run 'ldconfig' to update the library cache

Answer

Reinstall the 'foo' package using 'rpm -i --force foo.rpm'

Answer

Run 'rpm -q --whatrequires libbar.so.2'

Question 5

A system administrator wants to compile and install a program from source. After running './configure --prefix=/opt/myapp', the configure script fails with an error about missing 'libssl-dev'. What should the administrator do to resolve this issue?

Accepted Answer

Install the 'libssl-dev' package using the package manager. The configure script requires the development headers and static libraries for OpenSSL to compile software that uses SSL/TLS. The 'libssl-dev' package provides these headers and the .so symlinks needed during compilation. Installing it via the package manager (e.g., apt, yum) is the correct and standard method to satisfy this build dependency.

Answer

Manually download and place the missing header files in /usr/include

Answer

Install the 'libssl' runtime library

Answer

Add the '--disable-ssl' flag to ./configure

Question 6

A technician needs to remove a package named 'apache2' along with its configuration files from a Debian system. Which command should be used?

Accepted Answer

apt-get purge apache2. The 'apt-get purge' command removes the specified package along with its configuration files from a Debian system. Unlike 'remove', which leaves configuration files intact, 'purge' deletes both the package binaries and the associated configuration data from /etc and other locations, fulfilling the requirement to remove 'apache2' completely.

Answer

dpkg -r apache2

Answer

apt-get autoremove apache2

Answer

apt-get remove apache2

Question 7

A Linux administrator is managing a server that uses RPM-based package management. They need to find which installed package provides the '/etc/ssh/sshd_config' file. Which command should they use?

Accepted Answer

rpm -qf /etc/ssh/sshd_config. The correct command is `rpm -qf /etc/ssh/sshd_config`. The `-q` flag queries the RPM database, and `-f` (or `--file`) tells RPM to find which installed package owns the specified file. This is the standard way to map a file back to its originating package in RPM-based systems.

Answer

rpm -qi /etc/ssh/sshd_config

Answer

rpm -ql /etc/ssh/sshd_config

Answer

rpm -qa | grep sshd_config

Question 8

An organization uses a custom YUM repository. After adding a new RPM package to the repository, clients running 'yum update' do not see the new package. The repository metadata was regenerated using 'createrepo'. What is the most likely reason the clients are not seeing the update?

Accepted Answer

Clients have cached metadata and need to run 'yum clean all' or wait for cache expiration. YUM clients cache repository metadata locally to improve performance. When a new package is added to a repository and 'createrepo' regenerates the metadata, clients will not see the update until they refresh their cached metadata. Running 'yum clean all' removes the cached metadata and forces a fresh download, or the cache will expire based on the 'metadata_expire' setting in the repo configuration (default is 6 hours).

Answer

The 'gpgcheck=1' option in the repo file prevents metadata download

Answer

The repository metadata was not signed with a GPG key

Answer

The RPM package version number is lower than the currently installed version

Question 9

Based on the exhibit, the 'custom' repository shows 0 packages. What is the most likely cause?

Accepted Answer

The $releasever or $basearch variables are not expanding correctly, leading to an invalid URL. The 'custom' repository shows 0 packages because the $releasever or $basearch variables are not expanding correctly, resulting in an invalid or unreachable repository URL. Yum uses these variables to dynamically construct the baseurl, and if they are undefined or incorrect (e.g., due to a missing or misconfigured /etc/yum/vars/ directory or incorrect release version), the repository metadata cannot be downloaded, so yum reports 0 packages available.

Answer

The repository is disabled because 'enabled=1' is missing

Answer

The GPG key is missing, causing yum to ignore the repository

Answer

The repository metadata is corrupt and needs to be regenerated

Question 10

A system administrator needs to install a new kernel on a Debian-based system. Which TWO commands can be used to achieve this? (Choose TWO.)

Accepted Answer

apt-get install linux-image-5.10.0-20-amd64. Option C is correct because apt-get install linux-image-5.10.0-20-amd64 uses APT to resolve dependencies and install the specified kernel package from the configured Debian repositories, which is the standard way to install a new kernel on a Debian-based system. Option E is correct because dpkg -i linux-image-5.10.0-20-amd64.deb installs a locally downloaded kernel .deb package directly, which is a valid method when the package file is already present on the system. Option A is incorrect because apt-cache search only queries the package cache for available packages and does not install anything. Option B is incorrect because apt-get update merely refreshes the package index metadata from repositories and does not install a kernel. Option D is incorrect because make install is used to install software compiled from source, not to install a prebuilt Debian kernel package.

Answer

apt-cache search linux-image-5.10.0-20-amd64

Answer

apt-get update

Answer

make install

Question 11

Arrange the steps to schedule a cron job that runs a script every day at 2 AM.

Accepted Answer

1. Execute `crontab -e` to open the user's cron file. 2. Add the line `0 2 * * * /path/to/script` to the file. 3. Save and exit the editor. 4. Verify the cron job with `crontab -l`.. Crontab -e opens the user's cron file; the syntax minute hour day month weekday command must be correct.

Answer

1. Execute `crontab -e` to open the user's cron file. 2. Save and exit the editor. 3. Add the line `0 2 * * * /path/to/script` to the file. 4. Verify the cron job with `crontab -l`.

Answer

1. Verify the cron job with `crontab -l`. 2. Execute `crontab -e` to open the user's cron file. 3. Add the line `0 2 * * * /path/to/script` to the file. 4. Save and exit the editor.

Answer

1. Add the line `0 2 * * * /path/to/script` to the file. 2. Execute `crontab -e` to open the user's cron file. 3. Save and exit the editor. 4. Verify the cron job with `crontab -l`.

Question 12

Order the steps to configure a Linux system to use a proxy server for HTTP.

Accepted Answer

Step 1: Set environment variables (http_proxy, https_proxy, no_proxy) in /etc/environment or user shell config. Step 2: Source the config file (e.g., source ~/.bashrc) or log out/in. Step 3: Configure application-specific proxy settings (e.g., apt.conf, /etc/wgetrc). Step 4: Test connectivity using curl or wget.. Proxy configuration involves setting environment variables and application-specific configs.

Answer

Step 1: Configure application-specific proxy settings (e.g., apt.conf). Step 2: Set environment variables in /etc/environment. Step 3: Source the config file. Step 4: Test connectivity.

Answer

Step 1: Set environment variables in a terminal session (export http_proxy=...). Step 2: Configure application-specific settings. Step 3: Test connectivity. Step 4: Do not make settings persistent by saving to config files.

Answer

Step 1: Set environment variables in /etc/environment. Step 2: Test connectivity without sourcing or logging out. Step 3: Configure application-specific settings. Step 4: Reboot the system.

Question 13

Match each Linux directory to its standard purpose.

Accepted Answer

/bin: Essential user command binaries. Correct matches: /bin holds essential binaries, /etc stores system configuration, /var contains variable data. Common confusions arise from swapping purposes: /bin is not for variable data, /etc is not for temporary files, and /var does not hold binaries.

Answer

/bin: Variable data such as logs and spool files

Answer

/etc: Temporary files cleared on reboot

Answer

/var: Essential user command binaries

Question 14

A system administrator needs to install a local Debian package file named 'myapp.deb'. Which command should be used?

Accepted Answer

dpkg -i myapp.deb. The correct command to install a local Debian package file is `dpkg -i myapp.deb`. The `dpkg` tool is the low-level package manager for Debian-based systems that directly handles `.deb` files, and the `-i` flag triggers installation. Unlike `apt-get` or `aptitude`, `dpkg` does not resolve dependencies automatically, but it is the proper tool for installing a standalone `.deb` file from disk.

Answer

rpm -ivh myapp.deb

Answer

aptitude install myapp.deb

Answer

apt-get install myapp.deb

Question 15

A Linux administrator wants to update the local package index from all configured repositories on an Ubuntu system. Which command accomplishes this?

Accepted Answer

apt update. The `apt update` command (equivalent to `apt-get update`) refreshes the local package index by downloading the latest package lists from all repositories defined in `/etc/apt/sources.list` and `/etc/apt/sources.list.d/`. This is the prerequisite step before any installation or upgrade, ensuring the system knows about the newest available versions and dependencies.

Answer

dpkg --configure -a

Answer

apt upgrade

Answer

apt-get install