Basic unix commands

Below are some useful Unix commands

Move Cursor

Command	Description
k	Move cursor up one line
j	Move cursor down one line
h	Move cursor to the left one character position
l	Move cursor to right one character position
0 or |	Put cursor at beginning of line
$	Put cursor at end of line
w	Move cursor to  next word
b	Move cursor to previous word
(	Move cursor to beginning of current sentence.
)	Move cursor to beginning of next sentence
G	Move cursor at the last line of the file
H	Move cursor to top of screen

Insert Text

Command	Description
i	insert text before current cursor location
a	insert text after current cursor location
o	Creates a new line for text entry below cursor location

Delete Line

Command	Description
x	Deletes character under cursor position
X	Delete character before cursor position
dw	Deletes the current word
d$	delete all content to the right of the cursor
dd	Deletes the current line

Copy and Paste

Command	Description
yy	Copy current line
yw	Copy word
p	paste last copied/cut/deleted text after current cursor position

Some other useful commands

Command	Description	Example
cat	display file contents or Copy one or more file content to another file	Cat Cat fiel1 file2 > fileNew
chgrp	change file group
chmod	Changes the read, write and execute permissions for the file	chmod [mode] fileName
cp	copy source file into destination	cp [file1] [directory]/[file2]
grep	Search content in file	grep ^H fileName : It list all words start with H
head	display first 10 lines of a file	head fileName
tail	display last 10 lines of file	tail fileName
ls	display content of directory	ls
mkdir	make directory	mkdir dirName
cd	change directory	cd dirName
more	display data in paginated form
mv	move or rename file form old to new	mv file1 file2
rm	remove/delete file	rm fileName
rmdir	Removes or erases empty directory. You must first use `rm *' to empty the file	rmdir dirName
pwd	print current working directory	pwd
wc	count words. Lines and characters
who	Displays currently logged in users.	who
who am i	Displays current user id and access.	who am i