Editor

• Stream-oriented Editor
  • sed &awk, 2nd

• sed

flow control

command	description
:	A label is any sequence of up to seven characters. There are no spaces permitted between the colon and the label.
b	branch : transfers control unconditionally in a script to a line containing a specified label. If no label is specified, control passes to the end of the script.
c	change : replaces all addressed lines with a single copy of the text. No command following the change command in the script is applied.
d	delete : deletes the contents of the pattern space and causes a new line of input to be read and a new pass on the editing script to begin from the top
n	next : outputs the contents of the pattern space and then reads the next line of input without returning to the top of the script
t	test : branches to a label (or the end of the script) if a successful substitution has been made on the currently addressed line

multiline pattern space

command	description
D	Delete : delete only the first line of a multiline pattern space. It does not cause a new line of input to be read; instead, it returns to the top of the script, applying these instructions to what remains in the pattern space.
N	Next : read a new line of input and appending it to the contents of the pattern space
$!N	excludes the last line ($) from the Next command

hold space

command	description
h	hold : copy contents of pattern space to hold space
H	hold : append contents of pattern space to hold space
g	get : copy contents of hold space to pattern space
G	get : append contents of hold space to pattern space
x	exchange : swap contents of hold space and pattern space

• awk

system vairable

system variable	condition	description
FS	a single space	fields are separated by runs of spaces and/or tabs
FS	other single character	each occurrence of that character separates another field
FS	more than a single character	regular expression

operator

operator	description	example
~	match a regular expression	$5 ~ /MA/
!~	not match a regular expression

• vi
  • Learning the vi Editor, 6th, Learning the vi Editor, 5th
  • Linux vi and vim editor: Tutorial and advanced features
  • Vim documentation: help
  • Masterng the VI editor
  • Chapter 1. 編輯器 - emacs and vi
  • vi 文書處理器
  • Using vi, the Unix Visual Editor
  • Nick's guide to vi(m)
  • Unix is a Four Letter Word : The Vi Editor
  • VIM QUICK REFERENCE CARD

move

command	Descroption
gg or 1G or :1	move cursor to the beginning of file
G or :$	move cursor to the end of file
CTRL-f	scroll forward one page
CTRL-b	scroll back one page
:ju or :jumps	print the jump list
CTRL-I or <Tab>	go to newer cursor position in jump list
CTRL-O	go to older cursor position in jump list
:/xxx	search forward for xxx
n	find next occurrence of search
N	find previous occurrence of search

edit

command	Descroption
:reg	show the contents of all buffers(registers)
"x	use buffer(register) x
yy or Y	copy(yank) the entire line to buffer(register)
p	put the line in buffer below the cursor line
P	put the line in buffer above the cursor line
dd	delete the cursor line
m<a-z>	mark the cursor position with a letter
'<a-z>	line marked with a letter
v + » or «	to shift the block to the left/right

miscellaneous

command	Descroption
:set all	display all options
:set nu or :set number	display line numbers
:set nonu or :set nonumber	hide line numbers
CTRL-G	show file name, total lines, and current line number
:help xxx	get help on a command xxx
.	repeat the last command performed