CHAPTER TEN: ANALYZING FILES

Question 1

command: diff

Answer 1

it tells you what is different between to files.

Question 2

command: du

Answer 2

disk storage. to see how many bytes a file takes.

Question 3

command: du-h dir1

Answer 3

show in human readable form

Question 4

command: wc -i facts.txt

Answer 4

wc = word count, can tell you lines

Question 5

command: wc -w facts.txt

Answer 5

counts words

Question 6

command: wc -c facts.txt

Answer 6

counts characters/bytes

Question 7

command: wc facts.txt

Answer 7

counts words, lines and characters/bytes

Question 8

what is ASCII?

Answer 8

American standard code for information interchange. it is a code representing 128 English characters as numbers, with each letter assigned a number for 0 - 127

Question 9

Command: sort facts.txt

Answer 9

sort aphabetically

Question 10

command: sort -r facts.txt

Answer 10

reverse order

Question 11

command: sort -n numbers.txt

Answer 11

sort numerically

Question 12

Command sed

Answer 12

used to find and replace words in text

Question 13

Command awk

Answer 13

awk is a mini-programming language that is smarter than cut. used to analyse and processes text.

Question 14

[abc]

Answer 14

matches a b or c

Question 15

[!abc}

Answer 15

matches anything but a b or c

Question 16

[[:class:]]

Answer 16

matches a character class like digits or letters

Question 17

Sudo

Answer 17

it temporarily gives selected users permissions to run specific commands like they were a root