Linux学习笔记
最近在速通RHCE，也是顺便补一下Linux基础了，简单记录一下，有缘搭GitBook。
Tools
Vim
Basic
ESC Key
Ctrl-[ is equivalent to <Esc>, but easier to press.
You can also rebind the key too (personal preference).
Movement
h, j, k, l: to move around
Exiting
q: Quit without save
w: Write
wq: Write and Quit
x: Almost the same as wq, but shorter.
Useful settings
:set number :set nu: Display line number
:set relativenumber :set rnu: Display relative line number
Motions
motion := [count] <motion-keys>
Motion Keys
h, j, k, l: directions
w: forward a word
W: ignore punctuation
b: backward/beginning of a word
B: ignore punctuation
e: end of a word
E: ignore punctuation
^: start of the line (regex)
$: end of the line (regex)
f<letter>: find to next <letter> (inclusive)
F<letter>: backwards
t<letter>: find until next <letter> (exclusive)
T<letter>: backwards
/<pattern>: search forward
?<pattern>: backwards
Examples
10j: Move down 10 lines
5w: Move forward 5 words
3b: Move backward 3 words
fx: Find and move to next x
Operators
d: Delete
c: Change
y: Yank (Copy)
Duplicated Operator
command := [count] <operator> <operator>
Duplicated operator operates on the current line.
Examples
dd: Delete current line
3dd: Delete 3 lines
cc: Change current line
yy: Yank/Copy current line
3yy: Yank/Copy 3 lines
Capitalized Operator
D = d$
C = c$
Y = y$
Operator on motion
motion := [count] <motion-keys>
command := [count] <operator> <motion>
Examples
d3w: Delete 3 words
d5l: Delete 5 characters to the right
3d3w: Delete 3 words 3 times!
d$: Delete to the end of the line
Text Objects
text-object := [count] <modifier> <object-keys>
Modifiers
a: Around
i: Inner/Inside
Objects
a: Argument
w: Word
( = ) = b: Parenthesis (brackets)
{ = } = B: Braces
< = >: Diamond brackets
': Single quote
": Double quote
t: Tag block (XML/HTML)
Examples
aw: Around word
iw: Inner word
a": Around double quoted string
i": Inner double quoted string
Operator on text objects
text-object := [count] <modifier> <object-keys>
command := [count] <operator> <text-object>
Examples
di": Delete inner double quoted string
di': Delete inner single quoted string