010-160 - LPI Linux Essentials Searching and Extracting Data Questions and Answers

Question 1

A system administrator needs to find all files in the `/var/log` directory that have been modified in the last 7 days. Which of the following commands will accomplish this task?

Accepted Answer

find /var/log -mtime -7

Answer

grep -r -mtime 7 /var/log

Answer

find /var/log --modified 7

Answer

search /var/log -time 7

Question 2

Which command is used to display the first 10 lines of a text file named `report.txt`?

Accepted Answer

head report.txt

Answer

cat report.txt | top -n 10

Answer

less -n 10 report.txt

Answer

tail report.txt

Question 3

A user wants to search for the case-insensitive string "error" within the `system.log` file. Which of the following commands is the correct way to perform this search?

Accepted Answer

grep -i "error" system.log

Answer

find "error" system.log

Answer

search --ignore-case "error" system.log

Answer

cat system.log | filter -i "error"

Question 4

You have a comma-separated value (CSV) file named `data.csv` and you need to extract only the third column. Which command will achieve this?

Accepted Answer

cut -d ',' -f 3 data.csv

Answer

grep -c 3 data.csv

Answer

head -f 3 data.csv

Answer

split -c 3 data.csv

Question 5

To count the number of lines containing the word "warning" in the file `application.log`, which command should be used?

Accepted Answer

grep -c "warning" application.log

Answer

wc "warning" application.log

Answer

grep -n "warning" application.log

Answer

count "warning" < application.log

Question 6

A user needs to combine two commands. They want to list all files in the current directory and then use the output of that command to search for files containing the word "config". Which character should be used to connect the two commands?

Accepted Answer

|

Answer

>

Answer

&&

Answer

<