Lineno for 2 column

Question

How to add line number to a 2 column document where the line number must appear on the left for the left column and on the right for the right column. The lineno package does not seem to provide this option.

Answer 1

Use the switch option for the lineno package.

\documentclass[twocolumn]{article}
\usepackage[switch]{lineno} 
\usepackage{lipsum} %Creates example text
\begin{document}
\linenumbers
\lipsum[1-20]
\end{document}

Answer 2

The following is a partial solution.

\documentclass{article}
\usepackage{multicol}
\usepackage{lineno} 
\usepackage{lipsum}
\begin{document}
\begin{multicols}{2}
\linenumbers
\lipsum[1-1]
\columnbreak
\rightlinenumbers
\lipsum[1-1]
\end{multicols}
\end{document}

Answer 3

Simply add [columnwise] in the options of the package:

\usepackage[switch,columnwise]{lineno}