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Linux-Foundation LFCS Exam Questions

Linux-Foundation LFCS Exam Questions Answers

Linux Foundation Certified System Administrator

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  Updated August 15,2026
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Linux-Foundation LFCS Last 24 Hours Result

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Linux-Foundation LFCS Practice Test Questions ( Updated) – Real Exam Questions & Dumps PDF

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Linux-Foundation LFCS Sample Questions – Free Practice Test & Real Exam Prep

Question #1

Which of the following are tasks handled by a display manager like XDM or KDM? (Choose TWO correct answers.)

  • A. Start and prepare the desktop environment for the user. 
  • B. Configure additional devices like new monitors or projectors when they are attached. 
  • C. Handle the login of a user. 
  • D. Lock the screen when the user was inactive for a configurable amount of time. 
  • E. Create an X11 configuration file for the current graphic devices and monitors. 
Answer: A,C
Question #2

Which of the following is a valid IPv6 address? 

  • A. 2001:db8:3241::1  
  • B. 2001::db8:4581::1  
  • C. 2001:db8:0g41::1  
  • D. 2001%db8%9990%%1  
  • E. 2001.db8.819f..1  
Answer: A 
Question #3

Which of the following Linux filesystems preallocates a fixed number of inodes at the filesystem's make/creation time and does NOT generate them as needed? (Choose TWO correct answers.)

  • A. ext3  
  • B. JFS  
  • C. ext2  
  • C. ext2  
  • E. procfs  
Answer: A,C 
Question #4

When running the command sed -e "s/a/b/" /tmp/file >/tmp/file While /tmp/file contains data, why is /tmp/file empty afterwards?

  • A. The file order is incorrect. The destination file must be mentioned before the command to ensure redirection.
  • B. The command sed did not match anything in that file therefore the output is empty. 
  • C. When the shell establishes the redirection it overwrites the target file before the redirected command starts and opens it for reading. 
  • D. Redirection for shell commands do not work using the > character. It only works using the | character instead. 
Answer: C 
Question #5

The presence of what file will temporarily prevent all users except root from logging into the system? (Specify the full name of the file, including path.)

Answer: /etc/nologin  
Question #6

Immediately after deleting 3 lines of text in vi and moving the cursor to a different line, which single character command will insert the deleted content below the current line?

  • A. i (lowercase) 
  • B. P (uppercase) 
  • C. p (lowercase) 
  • D. U (uppercase) 
  • E. u (lowercase) 
Answer: C
Question #7

Which command is used to create and initialize the files used to store quota information? (Specify ONLY the commandwithout any path or parameters.)

Answer: quotacheck  
Question #8

Which of the following commands replaces each occurrence of 'bob' in the file letter with 'Bob' and writes the result to the file newletter?

  • A. sed '/bob/Bob' letter >newletter 
  • B. sed s/bob/Bob/ letter < newletter 
  • C. sed 's/bob/Bob' letter > newletter 
  • D. sed 's/bob/Bob/g' letter > newletter
  •  E. sed 's/bob, Bob/' letter > newletter 
Answer: D
Question #9

What is true regarding the command userdel --force --remove bob? (Choose TWO correct answers.) 

  • A. The user bob is removed from the system's user database.  
  • B. The user bob's home directory is removed.  
  • C. The locate database is updated to drop files owned by bob.  
  • D. All files owned by bob are remove from all mounted filesystems.  
  • E. In case bob was the last member of a group, that group is deleted.  
Answer: A,B 
Question #10

Which character starts a comment line in a shell script file?

  • A. ; 
  • B. * 
  • C. # 
  • D. / 
Answer: C
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