vi editor switches options descriptions

Hi All,
Now we are going to use world's most powerful editor vi.
Before we go further just learn how to create a hidden file in linux and see it.

$cat > [.name of file] 

A single dot in front of the file will make it hidden. For example to make a file named secret to hidden use this command

$cat > .secret
This is a secret file 

Now normal ls command will not list this file. Do a ls form current directory

$ls 

As you can see in output .secret file is not shown here. But can see hidden file with –a switch.

$ls –a
.secret 

Now rename and make it unhidden. Use mv command to rename the file

$mv .secret  test
$ls
test 

If we want to change the matter of file cat will not do it for us. So we will use vi editor to change matter of file.

$vi test 

This will open a window with bilking cursor. vi editor work in three different mode.

Esc         Command mode [press Esc key before giving any command]
Insert      Insert  mode [ to start editing use press Insert key ]
Exit        Exit mode [ Exit mode can be access via press Ecs key and :]

Beside it there are various command which can be used to control the behavior of vi editor, some of them most command are there to remember

Esc +:+w+q                    save and exit form file
Esc+:+q+!                     exit without saving
Esc+:+set nu                  to show hidden line
Esc+:+/test                   to find test word in forward directions
Esc+:+21                      to move cursor in line number 21
Esc+:+2+yy                    to copy 2 line form cursor
Esc+:+p                       to paste the copied line below the crusor
Esc+:+dd                      to remove the entire line
Esc+:+4+dd                    to remove 4 line below of cursor
Esc+:+x                       to remove single character
Esc+:+e                       to go to end of the word
Esc+:+h                       to go one character back