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Vi is the standard file editor for Unix and Vim is the standard file editor for Linux

For Red hat Linux vi and Vim both are same

There are three mode of vi editor

1. command mode
2. insert mode
3. save and Exit Mode

1. Command mode is again divided into 3 mode

1. Cursor movement
2. Copy, paste, delete, undo
3. Text search

1. Cursor Movement

J : Down

K : UP

L : RIGHT

H : LEFT

2. Copy, paste delete, undo

dd : delete particular line

yy : copy particular line

u : Undo

p : paste

ndd : n is the number of line to be deleted

nyy : n is the number of line to be copied

3. Text Search

/text

example

/then

2. Insert Mode

Option I, insert, a ,o, O

i : insert mode start at the point where cursor is. Same is used with

insert option

a : insert mode start after one character

o : insert mode start after one line

O : insert mode start before one line

3. Save and Exit

:q : Quiet

:q! : forcely quiet

:wq! : save and forcely quiet

:wq : save and exit