rhosts or /etc/hosts.
equiv file to support the rsh and rcp commands; better yet, and more secure, ensure that ssh and
scp are configured for all nodes in the cluster. Starting with Oracle 10g, the OUI will use ssh and
scp if possible, and fall back to rsh and rcp if necessary. Configuring ssh using the ssh-keygen
utility is beyond the scope of this book; consult with your Unix or Linux system administrator
to configure ssh and scp.
358 Oracle Database 11g DBA Handbook
Software Directories
Because I am using ASM in these examples for RAC storage, only one directory, /u01/app/oracle,
needs to be created on the local storage to hold the Oracle Database and the CRS software. The
disk volume on which this directory resides must have at least 4GB of space for the database and
CRS software. Use these commands to create this directory and assign the correct permissions:
[root@oc1 ~]# mkdir -p /u01/app/oracle
[root@oc1 ~]# chown -R oracle:oinstall /u01/app /u01/app/oracle
[root@oc1 ~]# chmod -R 775 /u01/app/oracle
[root@oc1 ~]# chown ??“R oracle:oinstall /u01/app
ASMLib Library
The ASMLib library for Linux is a support library for ASM instances in Oracle Database 10g and
later. Although you can reference raw disks directly when creating ASM diskgroups within an
ASM instance, ASMLib provides a number of benefits:
You can manage ASM disks at the operating system level; you don??™t have to refer to raw
disks from installer.
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