This article presents how to install Oracle 11G on Centos Linux 7.

Read following article how to install Centos Linux 7:Install Centos Linux 7 (for comfort set 2G memory for your virtual machine before proceeding with Oracle software installation).

Database software

linux.x64_11gR2_database_1of2.zip
linux.x64_11gR2_database_2of2.zip
 

OS configuration and preparation

Change hostname

####forever change
[[email protected] ~]#vi /etc/sysconfig/network
NETWORKING=yes
HOSTNAME= localhost
[[email protected] ~]# hostname
localhost

###required groups
su - root
/usr/sbin/groupadd -g 501 oinstall
/usr/sbin/groupadd -g 502 dba
/usr/sbin/groupadd -g 503 oper
 

Add user Oracle

/usr/sbin/useradd -u 502 -g oinstall -G dba,oper oracle

Change password for user

passwd oracle

su - root
vim /etc/sysctl.conf

kernel.shmmni = 4096 
kernel.shmmax = 4398046511104
kernel.shmall = 1073741824
kernel.sem = 250 32000 100 128

fs.aio-max-nr = 1048576
fs.file-max = 6815744
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
 

Apply kernel parameters

/sbin/sysctl -p

Add following lines to set shell limits for user oracle in file /etc/security/limits.conf

su - root
vim /etc/security/limits.conf

oracle   soft   nproc    131072
oracle   hard   nproc    131072
oracle   soft   nofile   131072
oracle   hard   nofile   131072
oracle   soft   core     unlimited
oracle   hard   core     unlimited
oracle   soft   memlock  50000000
oracle   hard   memlock  50000000

The “/etc/hosts” file must contain a fully qualified name for the server.

<IP-address>  <fully-qualified-machine-name>  <machine-name>

For example

vim /etc/hosts
127.0.0.1 localhost localhost.macrocurtain

Verify your network settings

[[email protected] ~]# ping -c 3 localhost
PING localhost (127.0.0.1) 56(84) bytes of data.
64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.135 ms
64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.041 ms
64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.062 ms

--- localhost ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.041/0.079/0.135/0.040 ms

Modify .bash_profile for user oracle in his home directory

su - oracle

vim .bash_profile

export TMP=/tmp
export ORACLE_HOSTNAME=localhost.macrocurtain
export ORACLE_UNQNAME=ORA11G
export ORACLE_BASE=/ora01/app/oracle # oracle資料庫根目錄
export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/db_1 # 資料庫檔案目錄
export ORACLE_SID=ORA11G # oracle資料庫例項名

PATH=/usr/sbin:$PATH:$ORACLE_HOME/bin # 命令宣告的目錄，例如sqlplus命令在此變數宣告的目錄中尋找

export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib; # 宣告共享庫目錄
export CLASSPATH=$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib;

alias cdob='cd $ORACLE_BASE'
alias cdoh='cd $ORACLE_HOME'
alias tns='cd $ORACLE_HOME/network/admin'
alias envo='env | grep ORACLE'
umask 022

source .bash_profile

Check which packages are installed and which are missing

su - root
rpm -q --qf '%{NAME}-%{VERSION}-%{RELEASE}(%{ARCH})\n' binutils \
elfutils-libelf \
elfutils-libelf-devel \
gcc \
gcc-c++ \
glibc \
glibc-common \
glibc-devel \
glibc-headers \
ksh \
libaio \
libaio-devel \
libgcc \
libstdc++ \
libstdc++-devel \
make \
sysstat \
unixODBC \
unixODBC-devel

In my case it returns following

binutils-2.25.1-31.base.el7(x86_64)
elfutils-libelf-0.168-8.el7(x86_64)
package elfutils-libelf-devel is not installed
package gcc is not installed
package gcc-c++ is not installed
glibc-2.17-196.el7(x86_64)
glibc-common-2.17-196.el7(x86_64)
package glibc-devel is not installed
package glibc-headers is not installed
package ksh is not installed
libaio-0.3.109-13.el7(x86_64)
package libaio-devel is not installed
libgcc-4.8.5-16.el7(x86_64)
libstdc++-4.8.5-16.el7(x86_64)
package libstdc++-devel is not installed
make-3.82-23.el7(x86_64)
sysstat-10.1.5-12.el7(x86_64)
package unixODBC is not installed
package unixODBC-devel is not installed

Missing packages are on Centos 7 installation dvd. Other option if you are connected to internet is just use yum install command.

• First option – use yum install command

yum -y install elfutils-libelf-devel
yum -y install gcc
yum -y install gcc-c++
yum -y install glibc-devel
yum -y install glibc-headers
yum -y install ksh
yum -y install libstdc++-devel
yum -y install unixODBC
yum -y install unixODBC-devel

or

yum -y install elfutils-libelf-devel gcc gcc-c++ glibc-devel glibc-headers ksh libaio-devel libstdc++-devel unixODBC unixODBC-devel

Installed:
  elfutils-libelf-devel.x86_64 0:0.168-8.el7                            
  gcc.x86_64 0:4.8.5-16.el7_4.2                                         
  gcc-c++.x86_64 0:4.8.5-16.el7_4.2                                     
  glibc-devel.x86_64 0:2.17-196.el7_4.2                                 
  glibc-headers.x86_64 0:2.17-196.el7_4.2                               
  ksh.x86_64 0:20120801-35.el7_4                                        
  libaio-devel.x86_64 0:0.3.109-13.el7                                  
  libstdc++-devel.x86_64 0:4.8.5-16.el7_4.2                             
  unixODBC.x86_64 0:2.3.1-11.el7                                        
  unixODBC-devel.x86_64 0:2.3.1-11.el7                                  

Dependency Installed:
  cpp.x86_64 0:4.8.5-16.el7_4.2         libmpc.x86_64 0:1.0.1-3.el7     
  zlib-devel.x86_64 0:1.2.7-17.el7     

Dependency Updated:
  glibc.x86_64 0:2.17-196.el7_4.2                                       
  glibc-common.x86_64 0:2.17-196.el7_4.2                                
  libgcc.x86_64 0:4.8.5-16.el7_4.2                                      
  libgomp.x86_64 0:4.8.5-16.el7_4.2                                     
  libstdc++.x86_64 0:4.8.5-16.el7_4.2                                   

Complete!

• Second option – just mount dvd and install missing packages using rpm -Uvh command from directory <mount dvd>/Packages.

NOTE – I’m using x86_64 version of packages

rpm -Uvh elfutils-libelf-devel*.x86_64.rpm
rpm -Uvh libaio-devel*.x86_64.rpm
rpm -Uvh unixODBC*.x86_64.rpm
rpm -Uvh ksh*.x86_64.rpm

Create directory structure

mkdir -p /ora01/app
chown oracle:oinstall /ora01/app
chmod 775 /ora01/app

create ORACLE_BASE directory for oracle

mkdir -p /ora01/app/oracle
chown oracle:oinstall /ora01/app/oracle
chmod 775 /ora01/app/oracle

Create ORACLE_HOME directory for oracle

mkdir -p /ora01/app/oracle/product/11.2.0/db_1
chown oracle:oinstall -R /ora01/app/oracle

Disable secure linux by editing the “/etc/selinux/config” file, making sure the SELINUX flag is set as follows. It requires REBOOT to be effective(rebooting after next step) !!!

vim /etc/selinux/config

SELINUX=permissive

In Centos Linux 7 /tmp data is stored on tmpfs which consumes memory and is too small. To revert it back to storage just run following command and REBOOT machine to be effective.

systemctl mask tmp.mount

reboot now

Install database software

Let’s start with database software installation as oracle user.

su - root
cd
rz linux.x64_11gR2_database_1of2.zip
rz linux.x64_11gR2_database_1of2.zip
mv linux.x64_11gR2_database_* /home/oracle

su - oracle

###unzip software
unzip linux.x64_11gR2_database_1of2.zip
unzip linux.x64_11gR2_database_2of2.zip

###I defined 4 aliases in .bash_profile of user oracle to make 
[[email protected] ~]$ alias envo cdob cdoh tns
  alias envo='env | grep ORACLE'
  alias cdob='cd $ORACLE_BASE'
  alias cdoh='cd $ORACLE_HOME'
  alias tns='cd $ORACLE_HOME/network/admin'

###run alias command envo to display environment settings
envo
ORACLE_UNQNAME=ORA11G
ORACLE_SID=ORA11G
ORACLE_BASE=/ora01/app/oracle
ORACLE_HOSTNAME=localhost.macrocurtain
ORACLE_HOME=/ora01/app/oracle/product/11.2.0/db_1

###run alias command cdob and cdoh to check ORACLE_BASE, ORACLE_HOME 
[[email protected] ~]$ cdob
[[email protected] oracle]$ pwd
/ora01/app/oracle

[[email protected] db_1]$ cdoh
[[email protected] db_1]$ pwd
/ora01/app/oracle/product/11.2.0/db_1

###run installation from install directory
cd
./database/runInstall

Checking monitor: must be configured to display at least 256 colors     
>>> Could not execute auto check for display colors using command /usr/bin/xdpyinfo. Check if the DISPLAY variable is set.    Failed <<<<

key:

su – root
 
DISPLAY=:0.0; export DISPLAY # 允許使用圖形介面
echo $DISPLAY
 
cd /usr/bin
./xhost
access control enabled, only authorized clients can connect
./xhost +
access control disabled, clients can connect from any host

to your physical host

su - oracle

DISPLAY=:0.0; export DISPLAY
echo $DISPLAY

cd /home/oracle/database
./runInstaller

1. Uncheck checkbox “I wish to receive security updates via My Oracle Support” and then click “Next” button.

2. Ignore following message and click “Yes” button.

3. Select “Skip software updates” and click “Next” button.

4. Select “Create and configure a database” then click “Next” button.

5. Select “Server Class” then click “Next” button.

6. Select “Single instance database installation” and click “Next” button.

7. Select “Typical Install” and click “Next” button.

8. Enter database name, administration password for user and click “Next” button.

• NOTE:please look at .bash_profile with user oracle,keep same with it
  

9. Just click “Next” button.

10. Check checkbox “Ignore All” to ignore this error.

11.Then click “Next” button.

12. Summary screen just before installation. Click “Finish” button.

13. Boring installation …

14. Database Configuration will start and create database for you,so slowly.

15. Click"OK" when Database Configuration Assistant:Warning and You should see summary screen for your new database. Click “OK” button to continue with installation.

16. In the “middle” of installation you will be asked to run 2 scripts as user root. when scripts are executed just click “OK” button. Installation will proceed.

###execute scripts
su - root

[[email protected] ~]# sh /ora01/app/oraInventory/orainstRoot.sh 
Changing permissions of /ora01/app/oraInventory.
Adding read,write permissions for group.
Removing read,write,execute permissions for world.

Changing groupname of /ora01/app/oraInventory to oinstall.
The execution of the script is complete.

[[email protected] ~]# sh /ora01/app/oracle/product/11.2.0/db_1/root.sh 
Running Oracle 11g root.sh script...

The following environment variables are set as:
    ORACLE_OWNER= oracle
    ORACLE_HOME=  /ora01/app/oracle/product/11.2.0/db_1

Enter the full pathname of the local bin directory: [/usr/local/bin]: /usr/local/bin

17. Installation completed. Just click “Close” button.

18.You should see all details about new database in database console

http://localhost.macrocurtain:1158/em

Post installation steps

Edit the “/etc/oratab” file to set restart flag for ORA11G to ‘Y’.

su - root
vim /etc/oratab

ORA11G:/ora01/app/oracle/product/11.2.0/db_1:Y

listen program

su - oracle
lsnrctl start

start oracle instance

sqlplus /nolog
conn as sysdba-->system
startup

stop oracle instance

shutdown
exit

lsnrctl stop

OK,FINE!!!

for 3 hours...