Linux Foundation Exam LFCS Topic 2 Question 53 Discussion

Actual exam question for Linux Foundation's LFCS exam

Question #: 53
Topic #: 2

[All LFCS Questions]

When running the command

sed -e "s/a/b/" /tmp/file >/tmp/file

While /tmp/file contains data, why is /tmp/file empty afterwards?

AThe file order is incorrect. The destination file must be mentioned before the command to ensure redirection.

BThe command sed did not match anything in that file therefore the output is empty.

CWhen the shell establishes the redirection it overwrites the target file before the redirected command starts and opens it for reading.

DRedirection for shell commands do not work using the > character. It only works using the | character instead.

Show Suggested Answer

Suggested Answer: D

by Refugia at Feb 06, 2023, 02:47 PM

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5 days ago

I think the answer is C. The shell overwrites the target file before the command starts.

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