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Super users are one or more trusted user names with permission to do wiki-wide operations that are more than simple administration rights (usually handle [[HelpOnAccessControlLists|ACLs]], delete pages, revert content).

== What can a Superuser do? ==
 * Use despam action to mass revert edits of some user
 * Use SystemAdmin page
 * Make full backups
 * Install software  
 * Install Languages via SystemPagesSetup . 
 * In their settings screen, they have a list of other users they can temporarily "become" in order to help those users or even disable that account. Logging out puts them back into their regular account.

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See HelpOnConfiguration to configure the super user, and some examples in HelpOnUserHandling and HelpOnPackageInstaller.