Vim显示行号

If you need number every time you start vi/vim, append following line to your ~/.vimrc file:

vi ~/.vimrc

Append the following line:

set number

Save and close the file.

Tip: Open a file at particular location/line number

Jump to particular line number from a shell prompt, enter:

$ vi +linenumber file.c
$ vi +300 initlib.c 

Jump to particular line that contains main() function from a shell prompt, enter:

$ vi +/searchTermHere file.c
$ vi +/main initlib.c
### note shell escape done with  ###
$ vi +/addUser( initlib.c
$ vi +/addUser(arg1) initlib.c

http://www.cyberciti.biz/faq/vi-show-line-numbers/