vim 回到上次编辑的位置

ctrl +O
ctrl + I(i)

When you move your cursor to a particular position in a file, Vim remembers this and
lets you move around between where you are where you were.

CTRL-O

goes
to the older position,
and

CTRL-I

or

tab

goes
to the newer one. 仅限于normal mode

from http://dailyvim.tumblr.com/post/6826612086/ctrl-o-and-ctrl-i-or-the-jumplist-or-friggin-vim-time
vim打开文件之后光标一般都在文件开头，想要跳到上次关闭文件前的位置用'0