# Links checker Since version 1.8.8.4, you can (manually) check whether a link is alive. To do this, click the small magnifier icon ![](/files/-LH9CySyPzC8uzJRsN3y) on the right side of the link as it is listed in the Links page. After a few seconds (or less), an icon appears. A green tick ![](/files/-LH9CyT4JFBwv8ukKpOd) means the link is valid. A red sign ![](/files/-LH9CyTA1i67rsWEnut2) means the link is broken. > **Note**: the links checker effectively tries to connect to the given link **from the server.** As such, a link that works for you might not work for the server, and vice-versa. This will require the server to be equipped with the CURL library. Check with your admin if this is the case. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.chamilo.org/1.11.x/teacher-guide/links/links_checker.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.