Edit text files, use filters, use regular expressions - Ch3

Question 1

cat

Answer 1

Command used to…
create and view files;
concatenate two or more files into one

Question 2

vi

Answer 2

Command to start vi editor

Question 3

How does one exit vi

Answer 3

Esc key

Question 4

How is text inserted using vi

Answer 4

i to insert before the cursor position

Question 5

How is text inserted at the beginning of a line while using vi?

Answer 5

l

Question 6

How is text appended after the current cursor position using vi?

Answer 6

a

Question 7

How is text appended at the end of the current line using vi?

Answer 7

A

Question 8

How is a new line opened below the current line using vi?

Answer 8

o

Question 9

How is a new line opened above the current line using vi?

Answer 9

O

Question 10

How are changes saved to a text file without exiting vi?

Answer 10

:w

Question 11

How are changes saved to a text file and vi exited?

Answer 11

:wq or :x or ZZ

Question 12

How is vi exited without saving changes to text file?

Answer 12

:q!

Question 13

cut

Answer 13

Used to filter, extract and display selected output

Question 14

fmt

Answer 14

Text formatting command used to set col width, add uniform spacing, add indentation, …

Question 15

od

Answer 15

Octal dumping: allows viewing file in mult formata

Question 16

join

Answer 16

Filter used to join each corresponding line from two files if join fields are identical

Question 17

paste

Answer 17

Filter used to display lines consisting of sequentially corresponding lines from one or more specified files

Question 18

sed

Answer 18

Stream editor used for filtering text and transforming output display as desired

Question 19

sort

Answer 19

Command used to arrange columns of text in a specified order for default screen display or alternately redirected to a file

Question 20

grep

Answer 20

Searches contents of one or more text files and displays matched information

Question 21

What are the 3 vi modes?

Answer 21

Command;
Edit;
Last line

Question 22

pr

Answer 22

Filter used to format text files for printing;
Output includes a header with file name, date & time, …
Includes a footer