XK0-006 Security Practice Question
An administrator needs to view all current nftables rules. Which command should be used?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
nft list ruleset
nft list ruleset displays the entire ruleset. nft list table only shows a specific table.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
nft list ruleset
Why this is correct
nft list ruleset prints every table, chain and rule in the current nftables configuration, giving a complete view of loaded rules across all families. This satisfies the requirement to view all current rules without specifying a particular table.
- ✗
nft --list
Why it's wrong here
nft --list requires a subcommand or object argument; alone it prints usage rather than the ruleset. It is tempting because --list is the listing flag, but the correct invocation is nft list ruleset, which enumerates every table, chain and rule currently loaded in the kernel.
- ✗
nft show ruleset
Why it's wrong here
nft show ruleset is invalid syntax; nft has no show subcommand, so the command errors out. It is tempting because 'show' appears in other network tools, but nftables uses list ruleset to display all tables, chains and rules currently loaded.
- ✗
iptables -L
Why it's wrong here
iptables -L reads the legacy iptables tables, not the nftables ruleset, so it shows nothing when rules were created with nft. It is tempting because iptables-nft presents a compatible frontend, but it only displays rules added through that compatibility layer, not native nftables configuration.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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