LPIC-1 Linux Installation and Package Management — 10 Questions

Question 1

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. Option A is correct because 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 2

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 3

A company maintains a private Debian repository for internal packages. A new package 'internal-tool' version 2.0 has been added to the repository, but when users run 'apt-get update && apt-get install internal-tool', the old version 1.0 is still being offered. What is the most likely cause?

Accepted Answer

The repository's Release file has not been regenerated after adding the new package. The most likely cause is that the repository's Release file has not been regenerated after adding the new package. APT relies on the Release file (and its associated InRelease or Release.gpg) to obtain the current package metadata, including version information. If the Release file is not updated to reflect the new package version 2.0, APT will still see the old metadata and offer version 1.0, even though the package file exists in the repository.

Answer

The package version number is not higher than the installed version

Answer

The local apt cache needs to be cleared with 'apt-get clean'

Answer

The 'apt-get update' command did not run successfully due to network issues

Question 4

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 5

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. Option C is correct because 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 6

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 7

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. Option A is correct because 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 8

Which TWO of the following commands can be used to list all installed packages on a Debian-based system?

Accepted Answer

apt list --installed. Option B is correct because `apt list --installed` is a modern APT command that lists all installed packages on Debian-based systems. Option D is correct because `dpkg -l` displays the status and names of all packages known to dpkg, including those installed, effectively listing installed packages.

Answer

apt-get check

Answer

apt-cache showpkg

Answer

dpkg --get-selections

Question 9

Which THREE of the following are valid methods to install a package from a local .deb file?

Accepted Answer

gdebi package.deb. C is correct because `gdebi` is a dedicated tool for installing local `.deb` packages while automatically resolving and fetching their dependencies from configured repositories. It provides a safer alternative to `dpkg` when dependency handling is required.

Answer

alien -i package.deb

Answer

rpm -i package.deb

Question 10

Based on the exhibit, what does the 'rc' status for the package 'apache2-bin' indicate?

Accepted Answer

The package has been removed but configuration files remain. In Debian-based package management (dpkg/APT), the 'rc' status code means the package was marked for removal ('r') but its configuration files were left behind ('c'). This occurs when using 'apt-get remove' or 'dpkg -r' without the --purge option, leaving residual config files in /etc or other locations.

Answer

The package is unpacked but not yet configured

Answer

The package has been completely purged

Answer

The package is installed and configured