How can I download and archive a mediawiki site?
You should first backup the entire wiki. This way, if something happens to your server, you'll still have a copy of the data available. Then, you can use tools such as wget or rsync to download just the content that has changed since the last time you backed it up. Additionally, you can set up an automated process to do this daily or weekly so that you always have a recent version of the wiki available.