1 - Open a Terminal window and type the command uname -a to determine if your Linux OS is 32- or 64-bit. If the output ends with "i386 GNU/Linux" or "i686 GNU/Linux" it is 32-bit; if it ends with "x86_64 GNU/Linux" it is 64-bit. (Note: other 64-bit architectures such as IA64 are not supported.) 2 - Download the appropriate installer file Tracker-4.xx-linux-32bit-installer.run or Tracker-4.xx-linux-64bit-installer.run from ComPADRE or the Tracker home page. 3 - Type sudo chmod 755 ~/Downloads/Tracker-4.xx-linux-yybit-installer.run (change xx and yy to the numbers for your installer) and enter your password to make the installer executable. Note: this and the next step assume the installer was downloaded to ~/Downloads/. If your download is different, change the command targets appropriately. 4 - Type sudo ~/Downloads/Tracker-4.xx-linux-yybit-installer.run to run the installer. 5 -Initial installation: install the Tracker application and options desired. We recommend you: (a) install the optional Xuggle video engine for maximum functionality and (b) accept the default installation paths for reliable upgrading and uninstallation. 6 - Upgrade: choose the installation option offered by the installer to overwrite the previous installation or uninstall the existing installation and reinstall from scratch. 7 - Launch: double-click the Tracker launcher in Dash or in the ~/Documents/Tracker folder.