Bash - 15 - Neovim

Command mode : keystrokes act as commands.
Insert and Replace mode for editing. (<Esc> to exit to Command mode)

Insert mode inserts any characters at cursor position.
Replace mode the characters entered replaces the character at the cursor position.

Five categories of keystrokes:

• Mode commands
• Cursor movement commands
• Editing commands
• File commands
• Miscellany

Mode commands :

<Esc> to move out of insert / replace mode.
I, i, A, a, O, o to move into insert mode at a particular place.
I at beginning of line i at current cursor position.
a immediately after the cursor position, A at the end of the line.
O in a blank line immediately above the cursor o immediately below the cursor.
R, r to enter replace mode and staying there or replacing one character and moving out after that to command mode.

Cursor Movement Commands:

hjkl for moving around.
h--l for left and right.
-jk- for down and up.
These can be prefixed with numbers to move certain distance. 2k, 10j, 13h.

Moving to Line Extremes :
0 just zero to move to left end (beginning) of the line.
$ (shift+4) to move to end of line.

Moving Over words :
b is beginning of current word, e is end of current word, w is jumping to next words.

w, b to move forward or backwards to the next/previous word or punctuation mark. (3w to move 3 word).
W, B moves one word
E, e similar but takes to end of current word or to next punctuation mark.

Page Motion :
Ctrl + b and Ctrl + d to move up and down by half page.
Ctrl + u and Ctrl + f to move up down by one full screen.

H, M, L Head, Middle, Last moves to these points in the file.

Absolute movement : Ctrl + G gives the current line number. (Capital G)

nG can be given to move to a particular line as if needed when it mentioned in an error.
40G moves to the 40th line 1G to the first line G moves to the end of the file.

Editing Commands

Which allows for cut copy an paste.

Deleting Text :
There are various forms of Cut (deletion) commands.
x deletes the current character.
D deletes from cursor to end of the line.
dd deletes the current line (5dd to delete multiple lines below it)
dw to delete current word or from cursor till next word (d5w to delete 5 words)
db deletes the previous word or to the left of cursor till end of word.

Moving Text :
Deleted items are moved into buffer, can be recalled or pasted anywhere.
p to paste/put before the cursor
P to paste/put after the cursor

Copying Text:
yanking is used to copy the file.
yy to copy the current line and yw to copy the current word to buffer.
6yy copies the 6 lines from cursor.

Buffer space : adding any letter from a to z to command allows to select 26 additional buffers.
a6yy copies 6 lines from the cursor into buffer a, then typing ap will paste those 6 lines after the cursor.

Joining Lines :
J to join two consecutive lines into one,
4J joins the following four lines with the current one.

Undoing Last Editing Instructions : u undoes the last changes made.
u can be combined with number also so undo multiple steps. 10u.

U undoes all changes made to the current line after the cursor moved to that line. If the cursor moved to another line then it won’t work.

Ctrl + r to redo the last command
10[Ctrl + r] also redoes multiple undoes.

xp transposes the current character with next character (similar to cut paste)

File Commands

File commands start with :
: will go to command line (when in Command mode)
:w to save the file
:w filename to save as (change file name)
:r filename to open a new file.
:q for closing a window
:wq to save and exit
:q! to discard changes and exit
:qa! Get out of Vim (all changes are lost) exiting from all deeper layers at once.

Miscellany

/string or ?string to search for a string

Substitution - Search and replace (:s/ /) :

:address/source_pattern/target_pattern/flags

The source pattern will be replaced by the target pattern in all lines specified by the address.
The address can be 1 or many numbers separated by a comma.
1,$ represents all lines in a file, from 1 to the end. % can be used instead.
:1,$s/director/member/g or :%s/director/member/g

Leaving out the g, the substitution will be carried out for the first occurrence in each address line, but not all in the line.

Target pattern is also optional, if left out then all the occurrences will deleted.
:1,50s/unsigned//g will delete unsigned from everywhere in lines 1 to 50.

$./director/member/g works on the current line.
$s/director/member/g works on only the last line.

To Make the substitution interactive, one by one with commands, using c as a flag.
:1,$s/director/member/gc
y to confirm and n to cancel. q to quit.

% to match the current section closing braces

v to start selection(visual) and moving any direction. (gU to Uppercase everything selected)

:help is general help window
Help can anything specific can be given as argument to :help command.
:help x, :help i_<esc>, :help :quit

Ctrl+] (square brace) or double mouse click on any tag vim will jump to that subject similar to help page. (if there are no help pages for that particular word, does’t go anywhere )

Ctrl+O (its not zero), or Ctrl + right mouse click or Ctrl+T to jump back to previous position. (repeat to go further back)

:help quit or :help word and pressing Ctrl+D will bring up all matching help entries to see

:Tutor for a tutorial on basics

:help quickref for the reference of command shortcuts

:terminal for a terminal session inside editor

:index for all the : commands

Links are opened by moving on it and pressing enter. Capital K which is Shift+K on any item will search for documentation ( Ctrl+] searches for tags of the word)

Pressing <Esc> will put in Command mode (or will cancel the partially typed command), which allows to retype a command.