This package is obsolete because there is a better alternative in Emacs 26 and later.
Emacs 26 officially provides the display-line-numbers function to show the line numbers and you can use the line-number-current-line
face to highlight the current line number.
They show the better performance than linum-mode and hlinum-mode.
This library extends linum-mode to highlight current line number. It requires Emacs 24.4 or later.
To use this package, add these lines to your .emacs file:
(require 'hlinum)
(hlinum-activate)And by using M-x linum-mode, you can see line numbers with highlighting current line number.
You can customize the color of highlighting current line by changing linum-highlight-face. By default, hlinum highlights current line only in the active buffer. To highlight current line in all buffers, change linum-highlight-in-all-buffersp to t.