Welcome to the first edition of the Linux Oracle Enterprise Manager Manual. Oracle Enterprise Manager is supported on multiple Unix, Linux and Windows operating systems on a wide variety of hardware and virtualization platforms. Oracle has consolidated all of the Oracle Enterprise Manager Unix, Linux and Windows operating system documentation within a large documentation library with hundreds of external links to My Oracle Support notes and addendum's. The Oracle Enterprise Manager installation documentation is presented in a consolidated format with the Unix, Linux and Windows operating system installation steps merged into the same sentences and paragraphs. For example, there is not a dedicated chapter or section about the installation of Oracle Enterprise Manager for Oracle Linux. The Linux installation steps are merged together with Unix and Windows. The consolidated format along with the external links to My Oracle Support make the Oracle Enterprise Manager 11g documentation challenging to use for any single operating system.