For this Purpose
Use this vi Command Syntax
To insert new text
esc + i ( You have to press ‘escape’ key then ‘i’)
To save file
esc + : + w (Press ‘escape’ key then ‘colon’ and finally ‘w’)
To save file with file name (save as)
esc + : + w “filename”
To quit the vi editor
esc + : + q
To quit without saving
esc + : + q!
To save and quit vi editor
esc + : + wq
To search for specified word in forward direction
esc + /word (Press ‘escape’ key, type /word-to-find, for e.g. to find word ‘shri‘, type as
/shri)
To continue with search
n
To search for specified word in backward direction
esc + ?word (Press ‘escape’ key, type word-to-find)
To copy the line where cursor is located
esc + yy
To paste the text just deleted or copied at the cursor
esc + p
To delete entire line where cursor is located
esc + dd
To delete word from cursor position
esc + dw
To Find all occurrence of given word and Replace then globally without confirmation
esc + :$s/word-to-find/word-to-replace/g
For. e.g. :$s/mumbai/pune/g
Here word “mumbai” is replace with “pune”
To Find all occurrence of given word and Replace then globally with confirmation
esc + :$s/word-to-find/word-to-replace/cg
To run shell command like ls, cp or date etc within vi
esc + :!shell-command

For e.g. :!pwd

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