Installing and configuring the PostgreSQL databse and python libraries 

 

 

 

Vim complete binding and Shortcuts

vim Complete Key Binding List

Definitions

• UNBOUND - this key is not normally bound to any vi command
  
• word - a lower-case word ("w", "b", "e" commands) is defined by a consecutive string of letters, numbers, or underscore, or a consecutive string of characters that is not any of {letters, numbers, underscore, whitespace}
• Word - an upper-case word ("W", "B", "E" commands) is a consecutive sequence of non-whitespace.
• sentence
• paragraph
• cursor motion command - any command which positions the cursor is ok here, including the use of numeric prefixes. In addition, a repeat of the edit command usually means to apply to the entire current line. For example, "<<" means shift current line left; "cc" means replace entire current line; and "dd" means delete entire current line. 

Key Bindings in Editing Modes

While in any edit mode (insert, replace, etc.) there are some keys that are used to adjust behaviour, rather than just to insert text.

• ESC - leave edit mode, return to command mode  
• ^D - move line backwards one shiftwidth. shiftwidth must be set, and either the line must be newly added, or ^T must have been used.
• ^T - move all after cursor forwards one shiftwidth
• ^H - deletes text that was entered during the current edit mode. Most versions of vi do not allow deleting to previous line.
• ^V - insert next character even if it is a editing character. 

complete key binding reference

Key	Action	Followed by
a	enter insertion mode after current character	text, ESC
b	back word
c	change command	cursor motion command
d	delete command	cursor motion command
e	end of word
f	find character after cursor in current line	character to find
g	UNBOUND
h	move left one character
i	enter insertion mode before current character	text, ESC
j	move down one line
k	move up one line
l	move right one character
m	mark current line and position	mark character tag (a-z)
n	repeat last search
o	open line below and enter insertion mode	text, ESC
p	put buffer after cursor
q	UNBOUND
r	replace single character at cursor	replacement character expected
s	substitute single character with new text	text, ESC
t	same as "f" but cursor moves to just before found character	character to find
u	undo
v	UNBOUND
w	move foreward one word
x	delete single character
y	yank command	cursor motion command
z	position current line	CR = top; "." = center; "-"=bottom
A	enter insertion mode after end of line	text, ESC
B	move back one Word
C	change to end of line	text, ESC
D	delete to end of line
E	move to end of Word
F	backwards version of "f"	character to find
G	goto line number prefixed, or goto end if none
H	home cursor - goto first line on screen
I	enter insertion mode before first non-whitespace character	text, ESC
J	join current line with next line
K	UNBOUND
L	goto last line on screen
M	goto middle line on screen
N	repeat last search, but in opposite direction of original search
O	open line above and enter insertion mode	text, ESC
P	put buffer before cursor
Q	leave visual mode (go into "ex" mode)
R	replace mode - replaces through end of current line, then inserts	text, ESC
S	substitute entire line - deletes line, enters insertion mode	text, ESC
T	backwards version of "t"	character to find
U	restores line to state when cursor was moved into it
V	UNBOUND
W	foreward Word
X	delete backwards single character
Y	yank entire line
Z	first half of quick save-and-exit	"Z"
0	move to column zero
1-9	numeric precursor to other commands	[additional numbers (0-9)] command
	(SPACE) move right one character
!	shell command filter	cursor motion command, shell command
@	vi eval	buffer name (a-z)
#	UNBOUND
$	move to end of line
%	match nearest [],(),{} on line, to its match (same line or others)
^	move to first non-whitespace character of line
&	repeat last ex substitution (":s ...") not including modifiers
*	UNBOUND
(	move to previous sentence
)	move to next sentence
\	UNBOUND
|	move to column zero
-	move to first non-whitespace of previous line
_	similar to "^" but uses numeric prefix oddly
=	UNBOUND
+	move to first non-whitespace of next line
[	move to previous "{...}" section	"["
]	move to next "{...}" section	"]"
{	move to previous blank-line separated section	"{"
}	move to next blank-line separated section	"}"
;	repeat last "f", "F", "t", or "T" command
'	move to marked line, first non-whitespace	character tag (a-z)
`	move to marked line, memorized column	character tag (a-z)
:	ex-submode	ex command
"	access numbered buffer; load or access lettered buffer	1-9,a-z
~	reverse case of current character and move cursor forward
,	reverse direction of last "f", "F", "t", or "T" command
.	repeat last text-changing command
/	search forward	search string, ESC or CR
<	unindent command	cursor motion command
>	indent command	cursor motion command
?	search backward	search string, ESC or CR
^A	UNBOUND
^B	back (up) one screen
^C	UNBOUND
^D	down half screen
^E	scroll text up (cursor doesn't move unless it has to)
^F	foreward (down) one screen
^G	show status
^H	backspace
^I	(TAB) UNBOUND
^J	line down
^K	UNBOUND
^L	refresh screen
^M	(CR) move to first non-whitespace of next line
^N	move down one line
^O	UNBOUND
^P	move up one line
^Q	XON
^R	does nothing (variants: redraw; multiple-redo)
^S	XOFF
^T	go to the file/code you were editing before the last tag jump
^U	up half screen
^V	UNBOUND
^W	UNBOUND
^X	UNBOUND
^Y	scroll text down (cursor doesn't move unless it has to)
^Z	suspend program
^[	(ESC) cancel started command; otherwise UNBOUND
^\	leave visual mode (go into "ex" mode)
^]	use word at cursor to lookup function in tags file, edit that file/code
^^	switch file buffers
^_	UNBOUND
^?	(DELETE) UNBOUND