wget https://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oracle-database-preinstall-21c-1.0-1.el7.x86_64.rpmwget https://yum.oracle.com/repo/OracleLinux/OL8/appstream/x86_64/getPackage/oracle-database-preinstall-21c-1.0-1.el8.x86_64.rpm

# cat /var/log/oracle-database-preinstall-21c/backup/Dec-28-2021-15-52-12/orakernel.log Adding group oinstall with gid 54321Adding group dba with gid 54322Adding group oper with gid 54323Adding group backupdba with gid 54324Adding group dgdba with gid 54325Adding group kmdba with gid 54326Adding group racdba with gid 54330Adding user oracle with user id 54321, initial login group oinstall, supplementary groups oinstall,dba,oper,backupdba,dgdba,kmdba,racdba and  home directory /home/oracleChanging ownership of /home/oracle to oracle:oinstallPlease set password for user - oracleuid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54323(oper),54324(backupdba),54325(dgdba),54326(kmdba),54330(racdba)User creation passed 
Saving a copy of the initial sysctl.confVerifying  kernel parameters as per Oracle recommendations...Trying to remove instances of  - setting for fs.file-max isAdding fs.file-max = 6815744 Trying to remove instances of  - setting for kernel.sem isAdding kernel.sem = 250 32000 100 128 Trying to remove instances of  - setting for kernel.shmmni isAdding kernel.shmmni = 4096 Trying to remove instances of  - setting for kernel.shmall isAdding kernel.shmall = 1073741824 Trying to remove instances of  - setting for kernel.shmmax isAdding kernel.shmmax = 4398046511104 Trying to remove instances of  - setting for kernel.panic_on_oops isAdding kernel.panic_on_oops = 1 Trying to remove instances of  - setting for net.core.rmem_default isAdding net.core.rmem_default = 262144 Trying to remove instances of  - setting for net.core.rmem_max isAdding net.core.rmem_max = 4194304 Trying to remove instances of  - setting for net.core.wmem_default isAdding net.core.wmem_default = 262144 Trying to remove instances of  - setting for net.core.wmem_max isAdding net.core.wmem_max = 1048576 Trying to remove instances of  - setting for net.ipv4.conf.all.rp_filter isAdding net.ipv4.conf.all.rp_filter = 2 Trying to remove instances of  - setting for net.ipv4.conf.default.rp_filter isAdding net.ipv4.conf.default.rp_filter = 2 Trying to remove instances of  - setting for fs.aio-max-nr isAdding fs.aio-max-nr = 1048576 Trying to remove instances of  - setting for net.ipv4.ip_local_port_range isAdding net.ipv4.ip_local_port_range = 9000 65500 Setting kernel parameters as per oracle recommendations...Altered file /etc/sysctl.confSaved a copy of the current file in /etc/sysctl.d/99-oracle-database-preinstall-21c-sysctl.confCheck /etc/sysctl.d for backupsVerification & setting of kernel parameters passed 
Setting user limits using /etc/security/limits.d/oracle-database-preinstall-21c.conf
Verifying oracle user OS limits as per Oracle recommendations...Adding oracle soft nofile  1024Adding oracle hard nofile  65536Adding oracle soft nproc  16384Adding oracle hard nproc  16384Adding oracle soft stack  10240Adding oracle hard stack  32768Adding oracle hard memlock  134217728Adding oracle soft memlock  134217728Adding oracle soft data  unlimitedAdding oracle hard data  unlimitedSetting oracle user OS limits as per Oracle recommendations...Altered file /etc/security/limits.d/oracle-database-preinstall-21c.confOriginal file backed up at /var/log/oracle-database-preinstall-21c/backup/Dec-28-2021-15-52-12Verification & setting of user limits passed 
Saving a copy of /etc/default/grub file in /etc/default/grub-initial.orabackupSaving a copy of /etc/default/grub in /var/log/oracle-database-preinstall-21c/backup/Dec-28-2021-15-52-12...Verifying kernel boot parameters as per Oracle recommendations...old boot params: "rd.lvm.lv=centos/swap vconsole.font=latarcyrheb-sun16 rd.lvm.lv=centos/root crashkernel=auto  vconsole.keymap=us rhgb quiet"new boot params: "rd.lvm.lv=centos/swap vconsole.font=latarcyrheb-sun16 rd.lvm.lv=centos/root crashkernel=auto vconsole.keymap=us rhgb quiet numa=off"
Setting boot params - Checking for blscfgold boot params: "rd.lvm.lv=centos/swap vconsole.font=latarcyrheb-sun16 rd.lvm.lv=centos/root crashkernel=auto vconsole.keymap=us rhgb quiet numa=off"new boot params: "rd.lvm.lv=centos/swap vconsole.font=latarcyrheb-sun16 rd.lvm.lv=centos/root crashkernel=auto vconsole.keymap=us rhgb quiet numa=off transparent_hugepage=never"
Setting boot params - Checking for blscfgSetting kernel boot parameters as per Oracle recommendations...G_DIR=/boot/grub2Default Kernel -> /boot/vmlinuz-3.10.0-123.el7.x86_64Running Kernel -> 3.10.0-123.el7.x86_64Saving a copy of grubenv... in /var/log/oracle-database-preinstall-21c/backup/Dec-28-2021-15-52-12Running grub2-mkconfigGenerating grub configuration file ...File descriptor 199 (/run/lock/subsys/oracle-preinstall.lock) leaked on vgs invocation. Parent PID 6603: /usr/sbin/grub2-probeFile descriptor 199 (/run/lock/subsys/oracle-preinstall.lock) leaked on vgs invocation. Parent PID 6603: /usr/sbin/grub2-probeFound linux image: /boot/vmlinuz-3.10.0-123.el7.x86_64Found initrd image: /boot/initramfs-3.10.0-123.el7.x86_64.imgWarning: Please don't use old title `CentOS Linux, with Linux 3.10.0-123.el7.x86_64' for GRUB_DEFAULT, use `Advanced options for CentOS Linux>CentOS Linux, with Linux 3.10.0-123.el7.x86_64' (for versions before 2.00) or `gnulinux-advanced-6f2bbd1f-912e-4f65-8e24-191d20e781b8>gnulinux-3.10.0-123.el7.x86_64-advanced-6f2bbd1f-912e-4f65-8e24-191d20e781b8' (for 2.00 or later)Found linux image: /boot/vmlinuz-0-rescue-0dcd05882fb70447861feb88e3315612Found initrd image: /boot/initramfs-0-rescue-0dcd05882fb70447861feb88e3315612.imgFile descriptor 199 (/run/lock/subsys/oracle-preinstall.lock) leaked on vgs invocation. Parent PID 6819: /usr/sbin/grub2-probeFile descriptor 199 (/run/lock/subsys/oracle-preinstall.lock) leaked on vgs invocation. Parent PID 6819: /usr/sbin/grub2-probedoneSetting the default back to /boot/vmlinuz-3.10.0-123.el7.x86_64Boot parameters will be effected on next rebootAltered file /etc/default/grubCopy of the changed file is in - /etc/default/grub-oracle-database-preinstall-21c.orabackupCopy of the original file is in - /var/log/oracle-database-preinstall-21c/backup/Dec-28-2021-15-52-12Verification & setting of boot parameters passed 
Trying to add NOZEROCONF parameter...Taking a backup of existing file to /etc/sysconfig/network.orabackupSuccessfully added parameter NOZEROCONF to /etc/sysconfig/networkSetting /etc/sysconfig/network parameters passed 
Disabling Transparent Hugepages. Refer Oracle Note:1557478.1
Disabling defrag. Refer Oracle Note:1557478.1
Taking a backup of old config files under /var/log/oracle-database-preinstall-21c/backup/Dec-28-2021-15-52-12

#  yum -y localinstall oracle-database-ee-21c-1.0-1.ol7.x86_64.rpmLoaded plugins: fastestmirrorExamining oracle-database-ee-21c-1.0-1.ol7.x86_64.rpm: oracle-database-ee-21c-1.0-1.x86_64Marking oracle-database-ee-21c-1.0-1.ol7.x86_64.rpm to be installedResolving Dependencies--> Running transaction check---> Package oracle-database-ee-21c.x86_64 0:1.0-1 will be installed--> Finished Dependency Resolution
Dependencies Resolved
============================================================================================================================= Package                          Arch             Version          Repository                                          Size=============================================================================================================================Installing: oracle-database-ee-21c           x86_64           1.0-1            /oracle-database-ee-21c-1.0-1.ol7.x86_64           7.1 G
Transaction Summary=============================================================================================================================Install  1 Package
Total size: 7.1 GInstalled size: 7.1 GDownloading packages:Running transaction checkRunning transaction testTransaction test succeededRunning transaction  Installing : oracle-database-ee-21c-1.0-1.x86_64                                                                       1/1[INFO] Executing post installation scripts...[INFO] Oracle home installed successfully and ready to be configured.To configure a sample Oracle Database you can execute the following service configuration script as root: /etc/init.d/oracledb_ORCLCDB-21c configure  Verifying  : oracle-database-ee-21c-1.0-1.x86_64                                                                       1/1
Installed:  oracle-database-ee-21c.x86_64 0:1.0-1
Complete!

# cat /var/log/oracle-database-ee-21c/results/oraInstall.log [INFO] Starting the installation process of the Oracle Database...12/29/2021-10:52:27 AM[INFO] Verifying the final status of the user after all the prechecks execution: uid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54323(oper),54324(backupdba),54325(dgdba),54326(kmdba),54330(racdba)[INFO] Registering Oracle home to the Oracle inventory...[INFO] Oracle home registered to the Oracle inventory.[INFO] Executing post installation scripts...[INFO] Setting up inventory as it has not been setup on this machine.[INFO] Configuring ADR directories...[INFO] ADR directories configured.[INFO] Post installation scripts executed successfully.[INFO] Creating configuration directories for Oracle Home...[INFO] Configuration directories created.[INFO] Post installation scripts executed successfully.[INFO] Oracle home installed successfully and ready to be configured.