yum install -y binutils-
yum install -y compat-libcap1
yum install -y compat-libstdc
yum install -y elfutils-libelf
yum install -y elfutils-libelf-devel-
yum install -y glibc
yum install -y glibc-common
yum install -y glibc-devel
yum install -y glibc-headers
yum install -y ksh-2
yum install -y libaio
yum install -y libaio-devel
yum install -y libgcc
yum install -y libstdc++
yum install -y libstdc++-devel
yum install -y make
yum install -y sysstat
yum install -y unixODBC
yum install -y unixODBC-devel

#cp /etc/sysctl.conf /etc/sysctl.conf.bak
cat >> /etc/sysctl.conf << EOF
###############
vm.swappiness = 1
vm.dirty_background_ratio = 3
vm.dirty_ratio = 80
vm.dirty_expire_centisecs = 500
vm.dirty_writeback_centisecs = 100
kernel.shmmax = 4398046511104
kernel.shmall = 1073741824
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 = 1048576
fs.aio-max-nr = 1048576
kernel.panic_on_oops = 1
fs.file-max = 6815744
EOF

groupadd --gid 1000 oinstall
groupadd --gid 1001 dba
groupadd --gid 1002 asmdba
groupadd --gid 1003 asmoper
groupadd --gid 1004 asmadmin
groupadd --gid 1005 oper
groupadd --gid 1006 backupdba
groupadd --gid 1007 dgdba
groupadd --gid 1008 kmdba
useradd --uid 1000 --gid oinstall --groups dba,oper,asmdba,asmoper,backupdba,dgdba,kmdba oracle
passwd oracle
useradd --uid 1001 --gid oinstall --groups dba,asmadmin,asmdba,asmoper grid
passwd grid

mkdir -p /u01/app/
chmod -R 775 /u01/app/
mkdir -p /u01/app/oraInventory
chown -R grid:oinstall /u01/app/oraInventory
chmod -R 775 /u01/app/oraInventory
mkdir -p /u01/app/grid
mkdir /u01/app/12.2.0/grid/product/grid -p
mkdir -p /u01/app/oracle
mkdir -p /u01/app/oracle/cfgtoollogs
chown -R grid:oinstall /u01/app/12.2.0
chown -R grid:oinstall /u01/app/grid
chown -R oracle:oinstall /u01/app/oracle/
chmod -R 775 /u01/app/oracle/
chmod -R 775 /u01/app/grid

touch /etc/security/limits.d/99-grid-oracle-limits.conf
cat >> /etc/security/limits.d/99-grid-oracle-limits.conf << EOF
oracle soft nproc 16384
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard nofile 65536
oracle soft stack 10240
oracle hard stack 32768
grid soft nproc 16384
grid hard nproc 16384
grid soft nofile 1024
grid hard nofile 65536
grid soft stack 10240
grid hard stack 32768
EOF

cd /etc/profile.d/
touch oracle-grid.sh

cat >> oracle-grid.sh << EOF
#Setting the appropriate ulimits for oracle and grid user
if [ $USER = "oracle" ]; then
if [ $SHELL = "/bin/ksh" ]; then
ulimit -u 16384
ulimit -n 65536
else
ulimit -u 16384 -n 65536
fi
fi
EOF

grid:

export ORACLE_BASE=/u01/app/grid
export ORACLE_HOME=/u01/app/12.2.0/grid/product/grid
export PATH=$PATH:/u01/app/12.2.0/grid/product/grid/bin
export ORACLE_SID=+ASM1

oracle:
export PATH
export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=/u01/app/oracle/product/12.2.0/dbhome_1
export PATH=$PATH:$ORACLE_HOME/bin
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib
export ORACLE_SID=prod