Using a terminal session
From Joomla! Documentation
For those with CPanel
Using your browser go to the CPanel of your site.
- Click on "File Manager"
- Click on the folder icon next to public_html - this directory is the "root" of your site.
- If you want the site in a sub-directory
- Click on "Create New Folder"
- Give the folder its name
- Click on the folder icon next to the folder you just created
- Click on "Upload Files"
- Navigate to the .gz install file you had downloaded to your computer
- Upload the file
- Click on the uploaded file in File Manager
- Click on the "Extract File Contents" option on the right
- You now have all the files on your system to continue with the install/upgrade process