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How to Install Oracle Yum in CentOS 7

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Here are steps to install Oracle yum respository to CentOS 7.

1. Download Oracle Linux 7 Public Yum Repository

First of all, you should make sure you have wget to download the file.

[root@primary01 ~]# which wget
/usr/bin/wget

If there's none, please install it.

[root@primary01 ~]# yum -y install wget
...

Then we download the repository from Oracle public yum server.

[root@primary01 ~]# cd /etc/yum.repos.d/
[root@primary01 yum.repos.d]# wget http://yum.oracle.com/public-yum-ol7.repo
[root@primary01 yum.repos.d]# ll public-yum-ol7.repo
-rw-r--r--. 1 root root 16402 Aug 26  2019 public-yum-ol7.repo

2. Download Oracle Linux 7 GPG Key

To prevent GPG key retrieval failed, we need to download the right GPG key for Oracle yum repository.

[root@primary01 yum.repos.d]# wget http://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol7 -O /etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
[root@primary01 yum.repos.d]# ll /etc/pki/rpm-gpg/
total 16
-rw-r--r--. 1 root root 1690 Oct 23  2020 RPM-GPG-KEY-CentOS-7
-rw-r--r--. 1 root root 1004 Oct 23  2020 RPM-GPG-KEY-CentOS-Debug-7
-rw-r--r--. 1 root root 1690 Oct 23  2020 RPM-GPG-KEY-CentOS-Testing-7
-rw-r--r--. 1 root root 1011 Jul 23  2014 RPM-GPG-KEY-oracle

Please note that, the target filename has been changed and different from the source.

Here we leave an informative release version for this OS.

[root@primary01 ~]# echo "Oracle Linux Server release 7.9" > /etc/oracle-release

3. Install Newest Oracle Linux 7 Public Yum Repository

To install the newest Oracle Software yum repository configuration that can manage packages more granularly from Oracle.

[root@primary01 yum.repos.d]# yum -y install oracle-software-release-el7
...

4. Enable Newest Oracle Yum Repository Configuration

We need to execute the following command to enable them.

[root@primary01 yum.repos.d]# /usr/bin/ol_yum_configure.sh
Repository ol7_UEKR5 already enabled
Repository ol7_latest already enabled

Let's see what we have now.

[root@primary01 yum.repos.d]# ll
total 80
-rw-r--r--. 1 root root  1664 Oct 23  2020 CentOS-Base.repo
-rw-r--r--. 1 root root  1309 Oct 23  2020 CentOS-CR.repo
-rw-r--r--. 1 root root   649 Oct 23  2020 CentOS-Debuginfo.repo
-rw-r--r--. 1 root root   314 Oct 23  2020 CentOS-fasttrack.repo
-rw-r--r--. 1 root root   630 Oct 23  2020 CentOS-Media.repo
-rw-r--r--. 1 root root  1331 Oct 23  2020 CentOS-Sources.repo
-rw-r--r--. 1 root root  8515 Oct 23  2020 CentOS-Vault.repo
-rw-r--r--. 1 root root   616 Oct 23  2020 CentOS-x86_64-kernel.repo
-rw-r--r--. 1 root root  4586 Mar  8 13:59 oracle-linux-ol7.repo
-rw-r--r--. 1 root root   251 Sep 28 02:52 oracle-software-ol7.repo
-rw-r--r--. 1 root root 16402 Aug 26  2019 public-yum-ol7.repo.sav
-rw-r--r--. 1 root root  2587 Mar  8 13:59 uek-ol7.repo
-rw-r--r--. 1 root root   226 Jun  9  2021 virt-ol7.repo

Optionally, you can remove or keep CentOS repositories.

[root@primary01 yum.repos.d]# rm -f ./CentOS-*

Let's check some Oracle dedicated package. For example,

[root@primary01 ~]# yum info oracle-rdbms-server-12cR1-preinstall
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Available Packages
Name        : oracle-rdbms-server-12cR1-preinstall
Arch        : x86_64
Version     : 1.0
Release     : 7.el7
Size        : 21 k
Repo        : ol7_latest/x86_64
Summary     : Sets the system for Oracle Database single instance and Real
            : Application Cluster install for Oracle Linux 7
License     : GPLv2
Description : The Oracle Preinstallation RPM package installs software packages
            : and sets system parameters required for Oracle Database single
            : instance and Oracle Real Application Clusters installations for
            : Oracle Linux Release 7 Files affected: /etc/sysctl.conf,
            : /boot/grub/menu.lst OR /boot/grub2/grub.cfg Files added:
            : /etc/security/limits.d/oracle-rdbms-server-12cR1-preinstall.conf

Done!

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