# Line number during cross-referencing. No Line number appears

I read these two questions: 1 and 2, but I am still in a trouble.

So, I have two files:

test1.tex:

\documentclass[12pt,a4paper]{article}
\usepackage[nopar]{lipsum}
\usepackage[pagewise]{lineno}
\begin{document}
\linenumbers  % enable line numbering
\lipsum[1-6]
\\ \\
\label{important}IMPORTANT INFORMATION
\\ \\
\lipsum[1-6]
\end{document}


and test2.tex:

\documentclass[12pt,a4paper]{article}
\usepackage[nopar]{lipsum}
\usepackage{xr}
\externaldocument{test1}
\begin{document}
Important information was given on line \ref{important} of page~\pageref{important}.
\end{document}


But line number did not appear. Could you help me to have referencing with line number?

You can refer with \ref to the number of a line, which has been marked with \linelabel{lne:item}. The command \lineref does something completely different, see the manual.

So you get your reference with:

\documentclass[12pt,a4paper]{article}
\usepackage[nopar]{lipsum}
\usepackage[pagewise]{lineno}
\begin{document}
\linenumbers  % enable line numbering
\lipsum[1-6]

\linelabel{lne:important}IMPORTANT INFORMATION

\lipsum[1-6]

The IMPORTANT INFORMATION ist given in line no. \ref{lne:important} on page
\pageref{lne:important}

\end{document}


The result ist something like »The IMPORTANT INFORMATION ist given in line no. 12 on page 2« in the PDF.