From LibGuides for Instruction A Service Design Point of View from an Academic Library by Elizabeth German
There are several ways to check links in your guides. You may need to use a combination of methods.
Chrome Extensions
Once you've added a Chrome extension such as Broken Link Checker or Check My Links, simply click on the accompanying toolbar button to scan the current page for broken URLs. Investigate broken links and fix or remove.
LibGuides Link Checker
LibGuides offers a Link Checker (select Tools, Link Checker from the orange nav bar). It is helpful as an admin tool, but using a Chrome extension is a more thorough and accurate way of checking your guides.
Review links manually
LibGuides has a built-in Link Checking tool that regularly scans Assets (including databases and books from the catalog) for broken links. It does not check inline links in rich text.
Any regular or admin user can access the link checker report. Although regular users can see every link listed in the report, they can only modify links for the assets they own. Admin users, however, can modify every link because they have the ability to edit any asset in your system.