Memory Tables

Question 1

> 1>

Answer 1

Redirects STDOUT. If redirection is to a file, the current contents of that file are overwritten.

Question 2

> > 1»

Answer 2

Redirects STDOUT in append mode. If output is written to a file, the output is appended to that file.

Question 3

2>

Answer 3

Redirects STDERR.

Question 4

2>&1

Answer 4

Redirects STDERR to the same destination as STDOUT. Notice that this has to be used in combination with normal output redirection, as in:

    ls whuhiu > errout 2>&1

Question 5

<
0<

Answer 5

Redirects STDIN.

Question 6

Esc

Answer 6

In vim, switches from input mode to command mode. Press this key before typing any command.

Question 7

i, a

Answer 7

In vim, switches from command mode to input mode at (i) or after (a) the current cursor position.

Question 8

o

Answer 8

In vim, opens a new line below the current cursor position and goes to input mode.

Question 9

:wq

Answer 9

In vim, writes the current file and quits.

Question 10

:q!

Answer 10

In vim, quits the file without applying any changes. The ! forces the command to do its work. Add the ! only if you really know what you are doing.

Question 11

:w filename

Answer 11

In vim, writes the current file with a new filename.

Question 12

dd

Answer 12

In vim, deletes the current line.

Question 13

yy

Answer 13

In vim, copies the current line.

Question 14

p

Answer 14

In vim, pastes the contents that have been cut or copied into memory.

Question 15

v

Answer 15

In vim, enters visual mode, which allows you to select a block of text using the arrow keys. Use d to cut the selection or y to copy it.

Question 16

u

Answer 16

In vim, undoes the last command. Repeat as often as necessary.

Question 17

Ctrl-r

Answer 17

In vim, redoes the last undo. (Cannot be repeated more than once.)

Question 18

gg

Answer 18

In vim, goes to the first line in the document.

Question 19

G

Answer 19

In vim, goes to the last line in the document.

Question 20

/text

Answer 20

In vim, searches for text from the current cursor position forward.

Question 21

?text

Answer 21

In vim, searches for text from the current cursor position backward.

Answer 22

In vim, goes to the first position in the current line.

Question 23

$

Answer 23

In vim, goes to the last position in the current line.

Question 24

!ls

Answer 24

In vim, adds the output of ls (or any other command) in the current file.

Question 25

:%s/old/new/g

Answer 25

In vim, this would replace all occurrences of old with new.