Free Linux Foundation LFCS Exam Questions

Become Linux Foundation Certified with updated LFCS exam questions and correct answers

Page: 1 / 52

Total 260 Questions | Updated On: Nov 26, 2025

Add To Cart

Question 1

When running the commandsed -e "s/a/b/" /tmp/file >/tmp/fileWhile /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 2

Which of the following environment variables overrides or extends the list of directoriesholding shared libraries?

A : LD_LOAD_PATH

B : LD_LIB_PATH

C : LD_LIBRARY_PATH

D : LD_SHARE_PATH

E : LD_RUN_PATH

Answer: C

Question 3

Given a file called birthdays containing lines like:YYYY-MM-DD Name1983-06-02 Tim1995-12-17 SueWhich command would you use to output the lines belonging to all people listed whosebirthday is in May or June?

A : grep '[56]' birthdays

B : grep 05?6? birthdays

C : grep '[0-9]*-0[56]-' birthdays

D : grep 06 birthdays | grep 05

Answer: C

Question 4

How can the normal output of a command be written to a file while discarding the error output?

A : command >2>file 1&>/dev/null

B : command < output > /dev/null

C : command > discard-error > file

D : command > /dev/null 2&>1 output

E : command >file 2>/dev/null

Answer: A

Question 5

Which of the following are requirements in order to run a shell script like a regularcommand from anywhere in the filesystem? (Choose THREE correct answers.)

A : The user issuing the command must be in the group script.

B : The script file must be found in the $PATH.

C : The script file must have the executable permission bit set.

D : The script must begin with a shebang-line (#!) that points to the correct interpreter.

E : The file system on which the script resides must be mounted with the option scripts.

Answer: B,C,D

Page: 1 / 52

Total 260 Questions | Updated On: Nov 26, 2025

Add To Cart