Links don’t show up in theme.

Are you talking about links to other sites? Have you added the links widget to your sidebar?

Here’s the template tag for “blogroll” links: https://codex.www.ads-software.com/wp_list_bookmarks

It may require some additional parameters depending on the style of your theme.

Like Chrisber said, you can also use the blogroll widget (if the theme is widget-ready).

I was talking about a “blogroll”, it won’t show up.. I’ll give the sidebar widget an attempt.