When you use Duplicator to backup your Wordpress site, the process ends with you downloading an installer.php file and a [date-name] _archive.zip file . You need these files to restore the backup.
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Start by uploading the installer.php and [date-name] _archive.zip files to the directory of the webhotell where you want to restore the Wordpress site. You can do this with an FTP client like FileZilla.
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How to upload files with FileZilla can be found here: FileZilla
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Once the files are uploaded to your webhotell, you can visit your domain name and the file installer.php in a web browser:https://mittnavn.no/installer.php
The options Overview, Options og Validation has some choice options and some information
Mark for read and accepted terms and clickNext.
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Let it work to complete the unpacking without leaving the browser window
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Leave Basic checked and fill in your database details under Setup
Under Options check the box for Legacy
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At the bottom of the page, first click on Test Database and let it complete the test. Then clickNext.
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A popup window will appear with a warning. Be sure to have a backup of the database before confirming withOK.
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Read here for how to download backup of your database:
Database Backup
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Make changes if needed in Setup . Under Options , a new user can also be created if necessary.
Click Next
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Make sure automatic file deletion is checked. Then click Admin login
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