MediaWiki contains over 200 maintenance scripts in its maintenance\ directory; you can see the full list here.
These scripts cover everything from actions like changing users' passwords and importing a batch of images, to much more obscure tasks like testing the MediaWiki parser.
There is a reasonable chance that you will never need to run a maintenance script while using Canasta. The most important maintenance script is update.php, but it is run during the container startup process, so if you need to run it, you can always get it to run simply by calling the canasta restart command.
As for runJobs.php, another popular maintenance script, the job queue is always automatically run during the entire life of the container.
However, in case you do want to run a MediaWiki maintenance script, you can call the following:
sudo canasta maintenance "SCRIPT_NAME.php"The quotation marks are there so that you can pass in flags to the script, and not have the canasta maintenance command think that these are its own flags. For instance, to create a new "WikiSysop" administrator account, with password "VerySecurePassw0rd", you could call the following:
sudo canasta maintenance "createAndPromote.php WikiSysop VerySecurePassw0rd --bureaucrat --sysop"