Ten things about vim

1.Vim Search and replace

http://vim.wikia.com/wiki/Search_and_replace

:%s/foo/bar/g

Find each occurrence of 'foo' (in all lines), and replace it with 'bar'.

:s/foo/bar/g

Find each occurrence of 'foo' (in the current line only), and replace it with 'bar'.

:%s/foo/bar/gc

Change each 'foo' to 'bar', but ask for confirmation first.

:%s/\<foo\>/bar/gc

Change only whole words exactly matching 'foo' to 'bar'; ask for confirmation.

:%s/foo/bar/gci

Change each 'foo' (case insensitive) to 'bar'; ask for confirmation.

This may be wanted after using :set noignorecase to make searches case sensitive (the default).

:%s/foo/bar/gcI

Change each 'foo' (case sensitive) to 'bar'; ask for confirmation.

This may be wanted after using :set ignorecase to make searches case insensitive.