010-160 Searching and Extracting Data 3

Question 1

Which find option is used to search by file modification time within the last 2 days?

Accepted Answer

find . -mtime -2

Answer

find -mtime -2 finds files whose modification time is less than 2 days ago.

Question 2

What does the `tr 'a-z' 'A-Z'` command do?

Accepted Answer

Translates lowercase letters to uppercase

Answer

tr translates characters; 'a-z' to 'A-Z' converts every lowercase letter to its uppercase equivalent.

Question 3

Which grep option prints the line number before each matching line?

Accepted Answer

-n

Answer

grep -n prefixes each matching line with its line number in the file.

Question 4

What does `uniq` do by default when given sorted input?

Accepted Answer

Removes consecutive duplicate lines

Answer

uniq removes consecutive duplicate lines, so input should be sorted first to eliminate all duplicates.

Question 5

Which command searches for files larger than 100MB?

Accepted Answer

find . -size +100M

Answer

find -size +100M finds files whose size exceeds 100 megabytes.

(010-160) LPI Linux Essentials Practice Test