197+ Free LFCS Practice Questions

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Question 1

Score: 0/0

Which command is used to display the current working directory?

pwd

dir

to track

2026 Statistics

Key Facts: LFCS Exam

50-60%

Est. Pass Rate

Industry estimate

66%

Passing Score

Linux Foundation

Tasks

Performance-based

120 min

Exam Duration

Linux Foundation

$395

Exam Fee

Linux Foundation

3 years

Cert Valid

Linux Foundation

The LFCS is a performance-based exam with approximately 24 tasks on a live Linux system in 120 minutes, requiring 66% to pass. The estimated pass rate is 50-60%. Candidates must demonstrate actual sysadmin skills rather than answer multiple choice questions.

Sample LFCS Practice Questions

Try these sample questions to test your LFCS exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 197+ question experience with AI tutoring.

1Which command is used to display the current working directory?

A.pwd

B.cd

C.ls

D.dir

Explanation: The pwd (print working directory) command displays the full pathname of the current working directory. The cd command changes directories, ls lists directory contents, and dir is not a standard Linux command (it is a Windows command).

2Which command would you use to create a new directory named "projects" in the current location?

A.mkdir projects

B.rmdir projects

C.touch projects

D.mk projects

Explanation: The mkdir command creates new directories. The rmdir command removes empty directories, touch creates empty files or updates timestamps, and mk is not a standard Linux command.

3What does the command "cp -r /source /destination" do?

A.Copies only files from source to destination

B.Recursively copies the source directory and all its contents to destination

C.Moves the source directory to destination

D.Creates a symbolic link from source to destination

Explanation: The cp -r command recursively copies directories and their contents. The -r flag stands for recursive. Without it, cp cannot copy directories. The mv command moves files/directories, and ln -s creates symbolic links.

4A user needs to find all files larger than 100MB in the /var directory. Which command should they use?

A.find /var -size +100M

B.find /var -size 100M

C.locate /var -size +100M

D.grep -r "100M" /var

Explanation: The find command with -size +100M searches for files larger than 100MB. The + prefix means "greater than". Without the +, it would search for exactly 100MB files. The locate command searches a prebuilt database and does not support size filters. grep searches file contents, not file sizes.

5Which command creates a hard link named "backup" pointing to the file "document.txt"?

A.ln document.txt backup

B.ln -s document.txt backup

C.link document.txt backup

D.cp -l document.txt backup

Explanation: The ln command without the -s flag creates a hard link. A hard link is another name for the same inode (file data). The ln -s command creates a symbolic (soft) link, which is a separate file pointing to the original. The link command does not exist, and cp -l creates a hard link via copy.

6Which command displays the first 10 lines of a file named "log.txt"?

A.head log.txt

B.tail log.txt

C.cat log.txt

D.less log.txt

Explanation: The head command displays the first 10 lines of a file by default. The tail command displays the last 10 lines. cat displays the entire file, and less is an interactive pager for viewing files.

7What does the command "grep -i error log.txt" do?

A.Counts the number of lines containing "error"

B.Searches for "error" case-insensitively in log.txt

C.Searches for "error" and displays line numbers

D.Searches for "error" and excludes it from output

Explanation: The grep -i command performs a case-insensitive search. Without -i, grep would be case-sensitive. The -c option counts matches, -n shows line numbers, and -v inverts the match (excludes lines).

8Which command is used to replace all occurrences of "foo" with "bar" in a file using in-place editing?

A.sed -i "s/foo/bar/g" file.txt

B.sed "s/foo/bar/" file.txt

C.awk "{gsub(/foo/,bar); print}" file.txt

D.grep -r "foo" | replace "bar"

Explanation: The sed -i command performs in-place editing. The s/foo/bar/g substitution replaces all (g = global) occurrences. Without -i, sed outputs to stdout without modifying the file. awk can also substitute but the syntax shown does not edit in-place.

9Which command counts the number of lines in a file named "data.csv"?

A.wc -l data.csv

B.wc -w data.csv

C.wc -c data.csv

D.count data.csv

Explanation: The wc -l command counts lines. The -w option counts words, -c counts bytes/characters. The count command does not exist in standard Linux distributions.

10Which awk command prints the first column of a space-separated file?

A.awk "{print $1}" file.txt

B.awk "{print $0}" file.txt

C.awk "{print $2}" file.txt

D.awk -F, "{print $1}" file.txt

Explanation: In awk, $1 refers to the first field/column, $0 refers to the entire line, and $2 refers to the second column. By default, awk uses whitespace as the field separator. The -F, option specifies comma as the delimiter.

About the LFCS Exam

The LFCS certification validates skills in Linux system administration. It is a performance-based exam where candidates solve real problems on a live Linux system. It covers essential commands, operation of running systems, user/group management, networking, storage, and service configuration.

Questions

24 scored questions

Time Limit

120 minutes

Passing Score

66%

Exam Fee

$395 (Linux Foundation / PSI)

LFCS Exam Content Outline

25%

Essential Commands

File management, text processing, archiving, permissions, hard/soft links, and searching

20%

Operation of Running Systems

Boot process, systemd services, process management, scheduling, logging, and system monitoring

20%

User & Group Management

Account administration, sudo configuration, PAM, password policies, and resource limits

20%

Networking

Network configuration, firewall rules, DNS resolution, SSH, and network troubleshooting

15%

Storage Management

Disk partitioning, LVM, filesystem creation/management, mount options, and RAID concepts

How to Pass the LFCS Exam

What You Need to Know

Passing score: 66%
Exam length: 24 questions
Time limit: 120 minutes
Exam fee: $395

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

LFCS Study Tips from Top Performers

1Practice on a live Linux system — the exam is 100% performance-based, no multiple choice

2Master file management commands: find, grep, sed, awk, tar, and permissions (chmod, chown)

3Know systemd service management: start, stop, enable, disable, status, and journal queries

4Practice LVM operations: create, extend, and resize logical volumes

5Study networking: ip, ss, firewall-cmd/iptables, nmcli, and DNS configuration

Frequently Asked Questions

What is the LFCS exam format?

LFCS is a performance-based exam where you complete tasks on a live Linux system. There are approximately 24 tasks in 120 minutes. You have access to man pages and system documentation but no internet access.

How hard is the LFCS?

The LFCS is considered challenging with a 50-60% pass rate. Being performance-based, you must actually perform tasks on a live system rather than select answers. Hands-on practice is essential.

Which Linux distribution is used?

You can choose between Ubuntu or CentOS/RHEL-family at exam time. Practice with your chosen distribution extensively. Know package management for both apt and yum/dnf.

How should I prepare?

Set up a Linux VM and practice all tasks hands-on. Focus on command-line operations, service management, user administration, and networking. Aim to complete tasks efficiently under time pressure.