Oracle 19c Server Prerequisites

 

Slide 1 — Oracle 19c Server Prerequisites

Server

• Linux 64-bit — Oracle Linux/RHEL supported version
• 2+ CPU cores
• 8 GB+ RAM recommended
• 50 GB+ available OS/software storage
• Static IP + hostname
• Internet/repository access

Example

hostname -f
ip addr
free -h
df -h

Slide 2 — Install OS Prerequisites

Update server

yum list oracle*

Install Oracle preinstallation package

yum -y install oracle-database-preinstall-19c

Verify Oracle user

id oracle

Expected:

uid=... (oracle)
groups=... (oinstall), ... (dba)

Slide 3 — Create Oracle Directories

mkdir -p /u01 /u02  u01 to install oracle database
 
/u02 to put our files
mkdir -p /u01/app/oracle/product/19.0.0/dbhome_1
chown -R oracle:oinstall /u01/app/oracle
chmod -R 775 /u01/app/oracle

Switch to Oracle user:

su - oracle

Set environment:

export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/19.0.0/dbhome_1
export PATH=$ORACLE_HOME/bin:$PATH

Slide 4 — Network & Firewall

Check hostname

hostname -f

Check connectivity

ping <client-or-server>

Open Oracle listener port

firewall-cmd --permanent --add-port=1521/tcp
firewall-cmd --reload

Verify:

firewall-cmd --list-ports

Slide 5 — Install Oracle 19c

Download Oracle 19c software from Oracle.

Extract it into:

/u01/app/oracle/product/19.0.0/dbhome_1

Then run as oracle:

cd $ORACLE_HOME
./runInstaller

During installation:

• Select Set Up Software Only
• Select Single Instance Database Installation
• Select Enterprise Edition/required edition
• Verify Oracle Base/Home
• Complete prerequisite checks
• Run root scripts when requested

Validate

lsnrctl status
sqlplus / as sysdba

Then:

SELECT name, open_mode FROM v$database;
SHOW PDBS;

Installation Flow

Linux Server
     ↓
Preinstall RPM
     ↓
Oracle User/Directories
     ↓
Network + Firewall
     ↓
Oracle 19c Software
     ↓
Listener
     ↓
DBCA
     ↓
CDB + PDB
     ↓
Validation