Tricks for vi editor: (for linux)

vi editor is one of the file editors in linux systems.
here's some tricks for exploiting it:
configure line no: on the go

$set number-causes the line numbers to be displayed.

$set nonumber-to turn off the line numbers

$set ignorecase-causes searches to be case insensitive

$help- to list other such commands along with their usage and parameters.

To spell check in a vi editor:
To do spell check without leaving the vi session, try the following key sequence
inside the vi:

$w !spell -b

This command will give u the list of the commands that are mispelled.