Centos7 pre-installation preparation oracle12C

In this case the operating system version: CentOS 7, database version: Oracle 12c (12.2.0)

oracle12c download link: linuxx64_12201_database   extraction code: n3z6

Of course, you can prepare your own good will upload and download files to the server, I upload the root directory: /

Preparations before installing Oracle:

Turn off the firewall, disable the firewall boot from Kai

Turn off the firewall

systemctl stop firewalld.service

Disable the firewall boot

systemctl disable firewalld.service

Check firewall status

systemctl status firewalld.service

yum install the necessary installation package

Use the second time (multiple times does not have other problems) yum install batch dependencies, if the execution fails again to continue

yum -y install binutils compat-libcap1 compat-libstdc++-33 compat-libstdc++-33*i686 compat-libstdc++-33*.devel compat-libstdc++-33 compat-libstdc++-33*.devel gcc gcc-c++ glibc glibc*.i686 glibc-devel glibc-devel*.i686 ksh libaio libaio*.i686 libaio-devel libaio-devel*.devel libgcc libgcc*.i686 libstdc++ libstdc++*.i686 libstdc++-devel libstdc++-devel*.devel libXi libXi*.i686 libXtst libXtst*.i686 make sysstat unixODBC unixODBC*.i686 unixODBC-devel unixODBC-devel*.i686

Check whether the installation was successful (31 installation package)

rpm -q binutils compat-libcap1 compat-libstdc++-33 gcc gcc-c++ glibc glibc-devel ksh libaio libaio-devel libgcc libstdc++ libstdc++-devel libXi libXtst make sysstat unixODBC unixODBC-devel

Creating swap 

For more details refer to the article :  Creating Swap

Creating oracle data directory (optional, not necessarily with the / u01)

mkdir /u01

Oracle create users and groups

Creating oinstall and dba groups

/usr/sbin/groupadd oinstall
/usr/sbin/groupadd dba

Create the oracle user

/usr/sbin/useradd -g oinstall -G dba oracle

Set oracle password

passwd oracle

View create results

id oracle

Set data directory permissions created above

chown -R oracle:oinstall /u01 
chmod -R 775 /u01 
chmod g+s /u01

Configuration parameters

Kernel configuration parameters (these parameters are different depending on the configuration of your machine, some parameters need to be modified again, check that step in the installation process oralce, will prompt, as required individually modified corresponding to the recommended value)

vim /etc/sysctl.conf

fs.aio-max-nr = 1048576
fs.file-max = 6815744
kernel.shmall = 2097152
kernel.shmmax = 8329226240
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

Press esc, and then: wq save and exit

Ulimit configuration parameters vim /etc/security/limits.conf

vim /etc/security/limits.conf

Add in the bottom of the file

oracle soft nproc 65536
oracle hard nproc 65536
oracle soft nofile 65536
oracle hard nofile 65536
oracle soft stack 65536
oracle hard stack 65536

Press esc, and then: wq save and exit

Set the time zone, upgrade the system, install the desktop environment (I installed a virtual machine desktop environment is already installed)

1. Set time zone

timedatectl set-timezone Asia/Shanghai

2. Upgrade System

yum clean all && yum update -y

3. Install the desktop environment (two pack must be, otherwise there will be installed oracle stuck phenomenon)

yum groupinstall "GNOME Desktop" "Server with GUI" -y

4. Set the boot installed desktop environment

systemctl set-default graphical.target

So far oracle data preparation before the installation is complete, restart the system ready to install reboot

reboot

See the next article oracle installation