Complete operating system configuration requirements and checks for Linux operating systems before you start installation.

• Guidelines for Linux Operating System Installation
  Operating system guidelines to be aware of before proceeding with an Oracle installation.
• Reviewing Operating System and Software Upgrade Best Practices
  These topics provide general planning guidelines and platform-specific information about upgrades and migration.
• Reviewing Operating System Security Common Practices
  Secure operating systems are an important basis for general system security.
• About Installation Fixup Scripts
  Oracle Universal Installer detects when the minimum requirements for an installation are not met, and creates shell scripts, called fixup scripts, to finish incomplete system configuration steps.
• About Operating System Requirements
  Depending on the products that you intend to install, verify that you have the required operating system kernel and packages installed.
• Using Oracle RPM Checker on IBM: Linux on System z
  Use the Oracle RPM Checker utility to verify that you have the required Red Hat Enterprise Linux or SUSE packages installed on the operating system before you start the Oracle Database or Oracle Grid Infrastructure installation.
• Operating System Requirements for x86-64 Linux Platforms
  The Linux distributions and packages listed in this section are supported for this release on x86-64.
• Operating System Requirements for IBM: Linux on System z
  The Linux distributions and packages listed in this section are supported for this release on IBM: Linux on System z.
• Additional Drivers and Software Packages for Linux
  Information about optional drivers and software packages.
• Checking Kernel and Package Requirements for Linux
  Verify your kernel and packages to see if they meet minimum requirements for installation.
• Setting Clock Source for VMs on Linux x86-64
  Oracle recommends that you set the clock source to tsc for better performance in virtual environments (VM) on Linux x86-64.
• Installing the cvuqdisk RPM for Linux
  If you do not use an Oracle Database Preinstallation RPM, and you want to use the Cluster Verification Utility, then you must install the cvuqdisk RPM.
• Reviewing HugePages Memory Allocation
  Review this information if your operating system has HugePages enabled.
• Disabling Transparent HugePages
  Oracle recommends that you disable Transparent HugePages before you start installation.
• Enabling the Name Service Cache Daemon
  To allow Oracle Clusterware to better tolerate network failures with NAS devices or NFS mounts, enable the Name Service Cache Daemon (nscd).
• Verifying the Disk I/O Scheduler on Linux
  For best performance for Oracle ASM, Oracle recommends that you use the Deadline I/O Scheduler.
• Using Automatic SSH Configuration During Installation
  To install Oracle software, configure secure shell (SSH) connectivity between all cluster member nodes.
• Setting Network Time Protocol for Cluster Time Synchronization
  Use either the Oracle Cluster Time Synchronization or network time protocol (NTP) option for time synchronization.