There are two ways to install Code Owners for Bitbucket Data Center / Server, both using the Universal Plug-in Manager:

Installing directly from Atlassian Marketplace

  1. Click the admin drop-down on your Bitbucket instance and choose Add-ons.
  2. Click Find new add-ons from the left-hand side of the page.
  3. Locate Code Owners for Bitbucket via search.
  4. Click Install to download and install the add-on.
  5. You're done!

Installing by file upload

  1. Download Code Owners for Bitbucket on the Atlassian Marketplace (Details Tab, click the download button).
  2. Click the admin drop-down on your Bitbucket Server instance and choose Add-ons.
  3. Click Manage Add-ons...
  4. Click the Upload add-on link at the top right side of the page. 
  5. Enter the location of the JAR file you downloaded.
  6. Click Upload.
  7. You're done!