Vim Working with multiple files

# Open all files
vim .

# To open all files in a dir in tabs
$ vim * -p

# To open all files in a dir in horizontally splitted windows
$ vim * -o

# To open all files in a dir in vertically splitted windows
$ vim * -O

# Open files in tabs
vim -p file1 file2 file3

# Close a tab
:tabc

# Edit a file in a new buffer
:e filename 

# go to next buffer
:bnext (or :bn)

# go to previous buffer
:bprev (of :bp) 

# delete a buffer (close a file)
:bd

# To open another tab
:tabe file.rb

# Move to the next tab
gt # or gT

# Open a file in a new buffer and split window
:sp filename 

# Vertically split window
:vs filename

# Quit a window
<C-w>q 

# Split windows vertically
<C-w>v 

# :new horizontal split (editing a new empty buffer)
<C-w>n

# :split window horizontally (editing current buffer)
<C-w>s 

# :vsplit window vertically (editing current buffer)
<C-w>v 

#  :close window
<C-w>c

# close all windows, leaving :only the current window open
<C-w>o

# go to next window
<C-w>w

# go to previous window
<C-w>p

# go to window above
<C-w><Up> 

# go to window below
<C-w><Down>

# go to window on left
<C-w><Left>

#  go to window on right
<C-w><Right>