010-160 Searching and Extracting Data 2

Question 1

Which grep option makes the search case-insensitive?

Accepted Answer

-i

Answer

The -i option tells grep to ignore case differences when matching patterns.

Question 2

What does the `cut -d: -f1` command do when processing /etc/passwd?

Accepted Answer

Prints the first field using colon as delimiter

Answer

cut -d: sets the delimiter to colon and -f1 selects the first field from each line.

Question 3

Which command would you use to sort a file's lines in reverse alphabetical order?

Accepted Answer

sort -r file

Answer

The sort -r option reverses the default sort order, producing reverse alphabetical output.

Question 4

What is the purpose of the `wc -l` command?

Accepted Answer

Count lines in a file

Answer

wc -l counts the number of newline-terminated lines in the input.

Question 5

Which sed command deletes all lines containing the word 'error'?

Accepted Answer

sed '/error/d' file

Answer

In sed, /pattern/d means 'delete lines that match the pattern'.

(010-160) LPI Linux Essentials Practice Test