Case-insensitive searching in vi
By default, all searches in vi are case-sensitive. To do a case-insensitive search, go into command mode (press Escape), and type
:set ignorecase. You can also type
:set ic as an abbreviation.
To change back to case-sensitive mode, type
:set noignorecase or
:set noic in command mode.
If you tend to use this feature a lot, consider putting
set ignorecase into your vi configuration file. See the article on customizing vi.