LFCS Certification Software Package Management 3

Question 1

Which command verifies the GPG signature of an RPM package file before installing it?

Accepted Answer

rpm --checksig package.rpm

Answer

`rpm --checksig` (or `-K`) checks the GPG and MD5 signatures of an RPM file to confirm authenticity.

Question 2

On Ubuntu, how would you prevent a package from being upgraded during `apt upgrade`?

Accepted Answer

apt-mark hold <package>

Answer

`apt-mark hold` places a hold on a package, preventing APT from automatically upgrading it.

Question 3

What does `dnf module enable :` do?

Accepted Answer

Activates a specific module stream so its packages become available for installation

Answer

Enabling a module stream makes that version's packages visible to DNF without installing anything yet.

Question 4

Which file format does `apt` use to authenticate repository packages?

Accepted Answer

ASCII-armored GPG key files (.gpg or .asc) stored in /etc/apt/trusted.gpg.d/

Answer

APT uses GPG keys stored in /etc/apt/trusted.gpg.d/ to verify the authenticity of repository Release files.

Question 5

What is the output of `rpm -qf /usr/bin/vim`?

Accepted Answer

The name of the package that owns /usr/bin/vim

Answer

`rpm -qf <file>` performs a reverse lookup, returning the package name that owns the specified file.

LFCS Certification Practice Test