This was probably discussed a lot of times, but I just don't know the technical term to search for this.
Situation: Let's assume there are many external links pointing to pages in a certain domain A (e. g. links in blogs or forums pointing to documentation and guides of a software product). Over the time, some of the contents and pages within domain A are vanishing, renamed or moved - but the external links to those contents still remain.
Now users that click on those external links will get a 404 error and in their subconsciousness they will associate something bad with the domain A and the products they are selling :)
What would be the common way for the domain-administrator to record the amount of 404 calls and the requested "paths" (i. e. the concrete page, that the user requested) for example if all sites are hosted within an apache-webserver?
Having this information it would be easy to maintain the quality of a web-appearance which will improve user experience and probably also rankings in search engines. Thanks a lot!