VIM

Question 1

Modes of operation of VIM:

Answer 1

1) command mode, default mode, keys causes action, not characters
2) insert mode, typing produces characters
3) lasline mode, search, quit, save, starts with the :

Question 2

Explain: i esc o O a A w b B

Answer 2

i gets you in insert mode
escape goes back to the command mode

o gets you insert mode one line below the cursor
O gets you insert mode one line above the cursor

a allows typing after the current position of the cursor
A jumps to the end of the line and allows to append to the end
w moves the cursor forward one word, W skips spaces
b moves backward one word, B skips spaces

Question 3

What does 30w and 30b do inside vim?

Answer 3

30w moves the cursor forward 30 lines

30b moves the cursor backward 30 lines

Question 4

what do u and control r do?

Answer 4

Simply typing the u key, it undoes what you did last

u can be used repeatedly. it will take as separator the change between command and insert mode

control r gets gets you back what you undid with u

Question 5

What do dd and typing p do?

Answer 5

dd deletes a whole line, puts it in a buffer, it is like ‘cutting’
typing p pastes what you dd’ed

Question 6

What does 4dd do?

Answer 6

4dd deletes 4 lines down the cursor

Question 7

What does x do the character where the cursor is?

Answer 7

x below a cursor “eats it”, that is, deletes it

Question 8

What does control G do?

Answer 8

control g gives you all kinds of info about the file:
“new” [Modified][New file] 6 lines –33%– 6,0-1 All

new is the name of the file
it has been modified
has 6 lines
cursor is at 33% of the length of the file
character position/column marker

Question 9

What does :shift zz do?

Answer 9

:shift zz gets you out, no changes are saved

Question 10

What does / do while in command mode?

Answer 10

/ searches for a string, in command mode

Question 11

How do you search for a string at the very beginning or the very end of a line?

Answer 11

/^ looks for the string at the very beginning of the line

/$ looks for the string at the very end of the line

Question 12

What does this do?

:%s///

Answer 12

replaces one for the other but only the first occurrence per line, not all

Question 13

What does this do?

:%s///g

Answer 13

replaces Globally all instances (all the matches)

Question 14

What does this do?

:%s///gc

Answer 14

replaces Globally all instances but asks for confirmation

Question 15

How do you select characters, lines and columns in visual mode?

Answer 15

v plus an arrow key in the desired direction selects words
V plus an arrow key in the desired direction selects whole lines
C v plus an arrow key in the desired direction selects columns of text

Question 16

What does # vimdiff file1 file2 do?

Answer 16

compares files highlighting the differences

Question 17

What is the tutor for teaching you to use vim?

Answer 17

vimtutor

Question 18

How do you split vim vertically?

Answer 18

:vsplit

Question 19

How do you split vim horizontally?

Answer 19

:split