Upgrading Confluence on Linux

1. Download the appropriate Confluence 'Linux 64-bit / 32-bit Installer' (.bin) file that suits your operating system (for the new version of Confluence) from the Confluence Download Center.
2. Open a Linux console and change directory (cd) to the '.bin' file's directory.
   If the '.bin' file is not executable after downloading it, make it executable, for example:
   chmod a+x atlassian-confluence-X.Y.bin
   (where X.Y represents your version of Confluence)
3. Execute the '.bin' file to start the upgrade wizard.
4. When prompted to choose between creating a new Confluence installation or upgrading an existing installation, choose the 'Upgrade an existing Confluence installation' option.