Install Oracle 11g R2 in RedHat 6

1. Check the system package
Rpm-q compat-libstdc ++-33 elfutils-libelf-devel glibc-common glibc-devel gcc-c ++ libaio-devel libaio libgcc libstdc ++ libstdc ++-devel make sysstat unixODBC-devel pdksh5.2.14

Note that the package pdk5.2.14 does not exist in rhel6 and needs to be downloaded separately. versions 5 can be found under the CD.
Ftp://ftp.pbone.net/mirror/archive.download.redhat.com/pub/redhat/linux/6.1/en/ OS /i386/RedHat/RPMS/pdksh-5.2.14-1.i386.rpm
Attached

2. Modify Kernel Parameters
Back up first
Cp/etc/sysctl. conf/etc/sysctl. conf. bk
Modify and add the following content.
Vi/etc/sysctl. conf
(The parameters here are different from those in the previous 10 Gb installation)

Fs. aio-max-nr = 1048576
Fs. file-max = 6815744
Kernel. shmall = 2097152
Kernel. shmmax = 536870912
Kernel. shmmni = 4096
Kernel. sem = 250 32000 100 128
Net. ipv4.ip _ local_port_range = 9000 65500
Net. core. rmem_default = 262144
Net. core. rmem_max = 4194304
Net. core. wmem_default = 262144
Net. core. wmem_max = 1048586

Sysctl-p
3. Add users and groups.
Groupadd dba
Groupadd oinstall
Useradd-g oinstall-G dba Oracle
Passwd oracle
4. Modify Environment Variables
Linux
Vi/home/oracle/. bash_profile
Export EDITOR = vi
Export ORACLE_SID = dex
Export ORACLE_BASE =/u01/apps/oracle
Export ORACLE_HOME = $ ORACLE_BASE/product/11gr2/db_1
Export nls_date_format = "yyyy-mm-dd hh24: mi: ss"
Export PATH =/u01/apps/oracle/product/11gr2/db_1/bin: $ PATH
5. Modify user restrictions
Vi/etc/security/limits. conf
Add at the end
Oracle soft nproc 2047
Hard nproc 16384
Oracle soft nofile 1024
Oracle hard nofile 65536

Vi/etc/pam. d/login
Add at the end
Session required/lib/security/pam_limits.so
6. edit/etc/profile
Vi/etc/profile
Add at the end
If [$ USER = "oracle"]; then
If [$ SHELL = "/bin/ksh"]; then
Ulimit-p 16384
Ulimit-n 65536
Else
Ulimit-u 16384-n 65536
Fi
Fi
7. Create a directory and authorize
Mkdir-p/u01/apps/oracle
Chown-R oracle: oinstall/u01
8. verify it.
Su-oracle
9. reboot, decompress,./runInstall
10. Good luck.