Vi/Vim

vi/vim is one of the most extensible and customizable and also difficult to learn.

vi has three modes

Command Mode - The default mode when you open vi/vim.
Insert Mode - This mode is to edit text Press i to enter insert mode.
Visual Mode - This mode will help you in selecting text. Press v to enter Visual mode

To enter command mode, press esc key on your keyboard. In command mode you cannot edit and in Insert mode you cannot execute a command.

Some Commands

:w --> Write changes meaning save the file

:q --> Quit the vi editor

:wq --> Save and edit

:q! --> exit without saving the recent changes

dd --> Deletes a line

ndd --> deletes n no. of lines (where n is intezer greater than 0)

y --> yank / copy

nyy --> yanks n no. of lines (where n is intezer greater than 0)

p --> Paste

u --> undo

ctrl+r --> redo

shift+g --> Takes to the bottom of the page

gg --> Takes to the top of the page

:set number --> View line numbers

:n --> Takes you to the nth line.

/string-to-search --> To search for a string

:s/string-to-search/string-to-replace/g --> Searches string and replaces wiht the replacement on current line Ex: :s/tect/text/g

:%s/string-to-search/string-to-replace/g --> Searches string and replaces wiht the replacement through out the file

:set number --> Sets the Line numbers