What happens when you run dnf update with no arguments?

Question

BlackTom AI · Accepted Answer

The question asks: What happens when you run dnf update with no arguments?

Option provided: 'b. It updates all installed packages'

Since the options list is empty, we cannot analyze other choices that might have been present. However, we can reason about the behavior of dnf update when invoked without arguments.

In practice, running dnf update without any package specifications tells DNF to check all installed packages against the latest available versions in enabled repos and perform updates to bring them up to date. This typically means downloading and installing newer package versions, applying updates, and solving dependency changes as needed. It is essentially the system-wide refresh of packages, ensuring the installed set matches the latest released versions.

Why this option is correct: updating all installed packages is precisely what dnf update without arguments is designed to do. It contrasts with targeting a specific package (e.g., dnf update httpd) or performing a dry run, which would limit the scope of updates.

Why other (hypothetical) options would be incorrect: if there were options suggesting that dnf update only checks for available updates without installing them, that would describe a dry-run or a search mode, not a full update. If an option claimed that updates would remove packages or reinstall the same versions, that would contradict the standard update operation, which aims to install newer releases and resolve dependencies rather than uninstalling packages or staying on older versions.

In summary, invoking dnf update with no arguments updates all installed packages to their latest available versions, aligning with the general purpose of the update command to refresh the system software.

CET-1025 - 50975 - Linux System Administration - 202505 - 001

What happens when you run dnf update with no arguments?

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