useful vim

 虽然 vi 用了好几年， 但没有真正的驾驭好vi

vi ---- vee-eye

vim, a X-based interface

1 insert mode

2 command mode

i --- insert

cw --- change word

typeseter

stty command  ： when the terimal is not control , can display and set the reponding key-values.

：pre & fg

h <--

l  -->

   |

   |

j  V

k ^

   |

   |

number as prefix parameters       ---- 4L0 (begin of line)

^ (first char in line )

$ (end of line)

G ( go )

G   ( go to end of file(buffer)   )

gg ( go to first line   )

number G ： go the number line.

cw, c2b, c$, c0

cc (change line)

(command) (text object)

(number) (command) (text object)

C=c$

s  （substitution/replace char）

S （replace whole line )

r (replace a  char)

R (replace mode, replace the next char untill ESC key)

~ (upler and lower convert)  (new version: number ~ : 6~)

d (delete )

dw (delete word ) d2w,2dw, db, d0,d$

dd (delete line) 2dd

D = d$

x (delete current char of cursor )

X ( delete char before )

p (paste from cut buffer)

xp (swap the 2 char )

dwwP (swap the 2 word)

ddp( swap 2 line )

y  yank( copy)

yy=Y, yw, y$, 4yy

. (repeat commond)

u （undo）

U （undo the line )

ctrl+r = (redo command)

A = append at $

I = insert at begin of line

o =  line-feed and insert

O = line-feed at last line

S = delete line and insert

J = join

这些都是基本的vi(m) 命令， 总结自己没能掌握的原理是：

1 思维的定势， 如删除几行， 就会用dd一行一行的删，

2 训练有限， 缺少压力

3 没有形成vi的思维

以后的学习， 尽可能的在用vi命令的时候思考一会，形成良好的放射效应。

努力学习linux内核及相关软件的维护与管理， 做一个优秀linux工程师。