Tutorial Instalasi Oracle Database 21c

I DO NOT HAVE ANY OF THIS SONG.
dont copyright strike me :(

LIST OF COMMANDS
// Install Oracle
yum install -y oracle-database-preinstall-21c

// Create Required Directories
mkdir -p /u01/app/oracle/product/21c/db_1/
mkdir -p /u01/app/oracle/oradata/
mkdir -p /u01/app/oracle/FRA/
chown -R oracle:oinstall /u01/
chmod -R 775 /u01/

// bash_profile i.e
vi .bash_profile

// Commands INSIDE the bash_profile
export TMP=/tmp
export TMPDIR=$TMP
export ORACLE_BASE=/u01/app/oracle
export DB_HOME=$ORACLE_BASE/product/21c/db_1
export ORACLE_HOME=$DB_HOME
export ORACLE_SID=test
export ORACLE_TERM=xterm
export BASE_PATH=/usr/sbin:$PATH
export PATH=$ORACLE_HOME/bin:$BASE_PATH
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib
export CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib

//check the bash_profile
. .bash_profile

//Changing limits command with super user
vi /etc/security/limits.conf

//Insert this commands INSIDE the limits
oracle soft nofile 1024
oracle hard nofile 65536
oracle soft nproc 16384
oracle hard nproc 16384
oracle soft stack 10240
oracle hard stack 32768
oracle hard memlock 134217728
oracle soft memlock 134217728

//Checking limits
./etc/security/limits.conf

//DISABLE FIREWALL
systemctl stop firewalld
systemctl disable firewalld

//Mount file commands (make sure to create filewin with mkdir filewin)
mount -t vboxsf inputvm /home/oracle/filewin

//Copy command
cp LINUX_X64_213000_db_home.zip $ORACLE_HOME

//Swapoff commands if Verification Result pops out
swapoff -a
dd if=/dev/zero of=/swapfile bs=1G count=4
mkswap /swapfile
swapon /swapfile

// User
sys as sysdba