Lesson 3

Question 1

>

Answer 1

Redirects standard output of a command to a file, overwriting the previous content

Question 2

> >

Answer 2

Redirects standard output of a command to a file, appending the new content to the previous content

Answer 3

Redirects standard input to command

Question 4

|

Answer 4

Redirects standard output of a command to another command

Question 5

wc

Answer 5

Gives word count (lines, words and characters)

Question 6

sort

Answer 6

Sorts lines of text alphabetically

Question 7

uniq

Answer 7

Filters duplicate, adjacent lines of text

Question 8

grep

Answer 8

Searches text for a pattern and outputs it

Question 9

sed

Answer 9

Searches text for pattern, modifies it, and outputs it
sed ‘s/originalWord/replacementWord/’ file.txt (s = substitute. Only substitutes first instance in a line)
sed ‘s/originalWord/replacementWord/g’ file.txt (g = global. Substitutes all instances)