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Tabs & Windows

Open files in multiple tabs.

vim -o file1.txt file2.txt file3.txt

o-vertical, O-horizontal

Switch tabs:

gt ->

gT <-

Switch windows:

<C+w>w ->

<C+w>W <-

Add permanent hotkey (Tab-key) to switch windows

cat ~/.vimrc
:noremap <Tab> <C-W>w

Substitution

:%s/\<foo\>/bar/gc Change only whole words exactly matching 'foo' to 'bar'; ask for confirmation.

:s/foo/bar/g Change each 'foo' to 'bar' in the current line.

:%s/foo/bar/g Change each 'foo' to 'bar' in all the lines.

:5,12s/foo/bar/g Change each 'foo' to 'bar' for all lines from line 5 to line 12 (inclusive).

:'a,'bs/foo/bar/g Change each 'foo' to 'bar' for all lines from mark a to mark b inclusive (see Note below).

:'<,'>s/foo/bar/g When compiled with +visual, change each 'foo' to 'bar' for all lines within a visual selection. Vim automatically appends the visual selection range ('<,'>) for any ex command when you select an area and enter :. Also, see Note below.

:.,$s/foo/bar/g Change each 'foo' to 'bar' for all lines from the current line (.) to the last line ($) inclusive.

:.,+2s/foo/bar/g Change each 'foo' to 'bar' for the current line (.) and the two next lines (+2).

:g/^baz/s/foo/bar/g Change each 'foo' to 'bar' in each line starting with 'baz'.

Fileformat

:set fileformat=unix
fileformat=dos

Display CRLF as ^M:

:e ++ff=unix

Substitute CRLF for LF:

:setlocal ff=unix
:w
:e

:set fileencoding=utf8
:w myfilename
:set bomb

Other

In editor u can write in command mode: :sh to get in into the shell. To move back press <C-D>.

:help is very helpfull :)

My .vimrc

:noremap <Tab> <C-W>w
set wildmenu
set wcm=<Tab>
menu Encoding.koi8-r  :e ++enc=koi8-r<CR>
menu Encoding.cp1251  :e ++enc=cp1251<CR>
menu Encoding.cp866   :e ++enc=cp866<CR>
menu Encoding.ucs-2le :e ++enc=ucs-2le<CR>
menu Encoding.utf-8   :e ++enc=utf-8<CR>
map <F12> :emenu Encoding.<Tab>