Unix Important command which will Defiantly help you .....:)

Unix Important command which will Defiantly help you .....:)


Give the Numbring in VI:
:se nu

How to find duplicate:-
/name

vi Find And Replace Text Command

:%s/FindMe/ReplaceME/g

 Find and Replace with Confirmation

:%s/UNIX/Linux/gc

Find and Replace Whole Word Only

:%s/\/Linux/gc

Case Insensitive Find and Replace

:%s/unix/Linux/gi

How Do I Replace In the Current Line Only?

:s/UNIX/Linux/g

How Do I Replace All Lines Between line 100 and line 250?

:100,200s/UNIX/Linux/gc

Some Vi Control :-

0 or | Positions cursor at beginning of line.

$ Positions cursor at end of line.

w Positions cursor to the next word.

b Positions cursor to previous word.

( Positions cursor to beginning of current sentence.

) Positions cursor to beginning of next sentence.

E Move to the end of Blank delimited word

{ Move a paragraph back

} Move a paragraph forward

[[ Move a section back

]] Move a section forward

n| Moves to the column n in the current line

1G Move to the first line of the file

G Move to the last line of the file

nG Move to nth line of the file

:n Move to nth line of the file

fc Move forward to c

Fc Move back to c

H Move to top of screen

nH Moves to nth line from the top of the screen

M Move to middle of screen

L Move to botton of screen

nL Moves to nth line from the bottom of the screen

:x Colon followed by a 

The basic syntax of AWK:

awk 'BEGIN {start_action} {action} END {stop_action}' filename

 awk '{print $1}' input_file

Here $1 has a meaning. $1, $2, $3... represents the first, second, third columns... in a row respectively.

1. Cursor Navigation (if your arrow keys dont work on that old Sun box....)
J	Next line
K	Previous line
H	Left
L	Right
Shift+G	Bottom of document
GG	Top of document

▲ up

2. Fast Search
/	Search Term
N	Next
N	Previous

▲ up

3. Command Mode
:	enter command mode
:w	write
:q	quit
:q!	quit without saving
:wq	Write and quit
ZZ	Write and quit
:e	open
Esc	escape command mode

▲ up

4. From Normal to Edit Mode
I	Insert at current position
I	Insert at start of line
A	Append to end of line
O	Insert Line Below
O	Insert Line Above
S	Delete character at current position and insert
S	Delete the current line and insert

▲ up

5. Clipboard
dw	delete word
dd	delete line
P	put after cursor
P	put before cursor
yw	copy word
yy	copy line