Linux Foundation Certified System Administrator

LFCS Practice Test

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Questions updated at Jul 10, 2026, 12:01 AM CDT

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LFCS

Linux Foundation Certified System Administrator

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Today's 10 LFCS questions

Use this LFCS practice test to review Linux Foundation Certified System Administrator. Questions rotate daily and each explanation links to the source used to validate the answer.

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Question 1 of 10

Objective 1.12 Operations Deployment

Which Podman command downloads an image from a registry without starting a container?

Concept tested: Operations Deployment (1.12)

Source:podman(1) manual

Question 2 of 10

Objective 2.1 Networking

Which ip command displays IP addresses assigned to interfaces?

Concept tested: Networking (2.1)

Question 3 of 10

Objective 1.7 Operations Deployment

How are systemd calendar timers ordered relative to time synchronization?

Concept tested: Operations Deployment (1.7)

Question 4 of 10

Objective 2.4 Networking

What is resolvectl used for?

Concept tested: Networking (2.4)

Question 5 of 10

Objective 1.14 Operations Deployment

Which SELinux policy model is abbreviated MLS?

Concept tested: Operations Deployment (1.14)

Question 6 of 10

Objective 2.2 Networking

Which command adds an IPv6 route for 2001:db8:0:0:0:0:0:0/32 through gateway fe80:0:0:0:0:0:0:1?

Concept tested: Networking (2.2)

Question 7 of 10

Objective 1.3 Operations Deployment

Which command checks whether the bluetooth systemd service is active and shows recent status details?

Concept tested: Operations Deployment (1.3)

Question 8 of 10

Objective 2.3 Networking

Which name-resolution protocol is abbreviated LLMNR?

Concept tested: Networking (2.3)

Question 9 of 10

Objective 1.5 Operations Deployment

Which file format is used to define scheduled cron jobs?

Concept tested: Operations Deployment (1.5)

Question 10 of 10

Objective 2.4 Networking

Which resolvectl subcommand queries DNS names through systemd-resolved?

Concept tested: Networking (2.4)

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UpdatedJul 10, 2026, 12:01 AM CDT

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Official exam resources

Use these official Linux Foundation resources alongside the daily practice set. They cover the provider's own exam page, study guide, or prep material.

Certification Linux Foundation LFCS certification Docs systemd documentation

Need adjacent Linux Foundation practice pages too? Linux Foundation practice hub.

Source-backed answer review

The free daily LFCS set includes crawlable question text, answer choices, correct answer labels, objective mapping, and source links. Only the first SEO card includes answer explanations. Pro-only bank questions stay locked; this section mirrors only the 10 free daily questions already shown on this page.

Question 1 Which Podman command downloads an image from a registry without starting a container?

Answer choices

A. podman pull
B. podman run
C. podman start
D. podman exec

Correct answer

podman pull

podman pull is correct because it retrieves an image from a registry. podman run creates and starts a container, start runs an existing container, and exec runs a process inside an existing container.

Wrong-answer review

B. podman run: podman run creates and starts a container, but it targets a different need than the scenario's goal.
C. podman start: podman start starts an existing container, but it targets a different need than the scenario's goal.
D. podman exec: podman exec runs a command inside an already-created container.

Objective/domain: Operations Deployment (1.12)

Source: podman(1) manual

Question 2 Which ip command displays IP addresses assigned to interfaces?

Answer choices

A. ip address list
B. ifconfig -a
C. netstat -i
D. ip address show

Correct answer

ip address show

Objective/domain: Networking (2.1)

Source: ip-address(8) Linux manual page

Question 3 How are systemd calendar timers ordered relative to time synchronization?

Answer choices

A. They are ordered before time-sync.target
B. They must be manually ordered by the administrator
C. They are automatically ordered after time-sync.target
D. They do not depend on any target unit

Correct answer

They are automatically ordered after time-sync.target

Objective/domain: Operations Deployment (1.7)

Source: systemd.timer manual

Question 4 What is resolvectl used for?

Answer choices

A. To monitor system logs
B. To configure network interfaces
C. To manage DNS resolution and introspect the resolver
D. To test network connectivity

Correct answer

To manage DNS resolution and introspect the resolver

Objective/domain: Networking (2.4)

Source: resolvectl manual

Question 5 Which SELinux policy model is abbreviated MLS?

Answer choices

A. Multi-Level Security
B. Role-Based Access Control
C. Type Enforcement
D. Labeling

Correct answer

Multi-Level Security

Objective/domain: Operations Deployment (1.14)

Source: selinux(8) Linux manual page

Question 6 Which command adds an IPv6 route for 2001:db8:0:0:0:0:0:0/32 through gateway fe80:0:0:0:0:0:0:1?

Answer choices

A. ip -6 route add 2001:db8:0:0:0:0:0:0/32 via fe80:0:0:0:0:0:0:1
B. route -A inet6 add 2001:db8:0:0:0:0:0:0/32 gw fe80:0:0:0:0:0:0:1
C. netstat -r6 add 2001:db8:0:0:0:0:0:0/32 via fe80:0:0:0:0:0:0:1
D. ifconfig route6 add 2001:db8:0:0:0:0:0:0/32 via fe80:0:0:0:0:0:0:1

Correct answer

ip -6 route add 2001:db8:0:0:0:0:0:0/32 via fe80:0:0:0:0:0:0:1

Objective/domain: Networking (2.2)

Source: ip-route(8) Linux manual page

Question 7 Which command checks whether the bluetooth systemd service is active and shows recent status details?

Answer choices

A. systemctl start bluetooth
B. systemctl status bluetooth
C. systemctl enable bluetooth
D. systemctl restart bluetooth

Correct answer

systemctl status bluetooth

Objective/domain: Operations Deployment (1.3)

Source: systemctl manual

Question 8 Which name-resolution protocol is abbreviated LLMNR?

Answer choices

A. NIS
B. MulticastDNS
C. DHCP
D. Link-Local Multicast Name Resolution (LLMNR)

Correct answer

Link-Local Multicast Name Resolution (LLMNR)

Objective/domain: Networking (2.3)

Source: systemd-resolved service manual

Question 9 Which file format is used to define scheduled cron jobs?

Answer choices

A. crontab
B. cronfile
C. scheduletab
D. joblist

Correct answer

crontab

Objective/domain: Operations Deployment (1.5)

Source: crontab(5) Linux manual page

Question 10 Which resolvectl subcommand queries DNS names through systemd-resolved?

Answer choices

A. resolvectl query
B. nslookup
C. dig
D. host

Correct answer

resolvectl query

Objective/domain: Networking (2.4)

Source: resolvectl manual

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