To show line numbers in Vim is easy:
set number or
Many movement, yank and delete operations in Vim work on relative line numbers. For example, to delete the next 5 lines the command
d5j can be used. To aid such operations, many users prefer to view relative line numbers: the current line is 0 and the lines moving up and down from current line are incrementally numbered.
To show relative line numbers in Vim:
set relativenumber or
Vim 7.4 adds a hybrid mode for line numbers: the current line shows the absolute line number while the rest show the relative line number. I find this very useful.
To turn on hybrid line number, set both the
Tried with: Vim 7.4 and Ubuntu 14.04