<\/div>\n\n\n\n
2.5. Check Oracle Linux specific packages<\/h3>\n\n\n\n
Some packages are only provided by Oracle Linux, but the default installation is basically the same. For your reference, here are the packages named oracle. We will leave out the details, but they are the parts that must be changed, such as the logos, licenses, repositories, GPG keys, etc.<\/p>\n\n\n\n
# rpm -qa | grep oracle\noraclelinux-release-8.6-1.0.5.el8.x86_64\noraclelinux-release-el8-1.0-23.el8.x86_64\noracle-logos-84.5-1.0.1.el8.x86_64<\/code><\/pre>\n\n\n\n<\/div>\n\n\n\n
3. Change the kernel to RHCK<\/h2>\n\n\n\n
For your reference, here’s how to change the default kernel UEK to RHCK. Use grubby<\/strong> for changes.<\/p>\n\n\n\n1. Check the default kernel. You can see that it is \/boot\/vmlinuz-5.4.17-2136.307.3.1.el8uek.x86_64<\/strong> with index number “0”.<\/p>\n\n\n\n# grubby --default-index\n0\n\n# grubby --default-kernel\n\/boot\/vmlinuz-5.4.17-2136.307.3.1.el8uek.x86_64<\/code><\/pre>\n\n\n\n2. Next, it displays a list of the installed kernels. index = 1<\/strong> is RHCK.<\/p>\n\n\n\n# grubby --info=ALL | grep -A 1 ^index\nindex=0\nkernel=\"\/boot\/vmlinuz-5.4.17-2136.307.3.1.el8uek.x86_64\"\n--\nindex=1\nkernel=\"\/boot\/vmlinuz-4.18.0-372.9.1.el8.x86_64\"\n--\nindex=2\nkernel=\"\/boot\/vmlinuz-0-rescue-5b64998859b34f7884afea6dd27a9390\"<\/code><\/pre>\n\n\n\n3. Changes can be made by specifying the kernel path or by specifying the index number. You can use either, but you should specify the kernel path to prevent errors.<\/p>\n\n\n\n
\u2605Specify the kernel path\n# grubby --set-default=\/boot\/vmlinuz-4.18.0-372.9.1.el8.x86_64\n\u2605Specify the index number\n# grubby --set-default-index=1 <\/code><\/pre>\n\n\n\n4. Ensure that the default kernel has been changed to RHCK.<\/p>\n\n\n\n
# grubby --default-kernel\n\/boot\/vmlinuz-4.18.0-372.9.1.el8.x86_64<\/code><\/pre>\n\n\n\n5. Next, change the default kernel to an RH-compatible kernel using \/etc\/sysconfig\/kernel<\/strong>. If you don’t fix this, you will return to UEK when you update yum.<\/p>\n\n\n\n<\/div>\n\n\n\n
\/etc\/sysconfig\/kernel contents<\/h4>\n\n\n\n# UPDATEDEFAULT specifies if kernel-install should make\n# new kernels the default\nUPDATEDEFAULT=yes\n\n# DEFAULTKERNEL specifies the default kernel package type\nDEFAULTKERNEL=kernel\n#DEFAULTKERNEL=kernel-uek \u2605Comment out and add the line above<\/code><\/pre>\n\n\n\nYou can change it manually, but you can also change it with the following command.<\/p>\n\n\n\n
# sed -i -e 's\/DEFAULTKERNEL=kernel-uek\/DEFAULTKERNEL=kernel\/' \/etc\/sysconfig\/kernel<\/code><\/pre>\n\n\n\n6. Restart to enable the modified kernel.<\/p>\n\n\n\n
# shutdown -r<\/code><\/pre>\n\n\n\n7. When you log in after rebooting, it has changed to an RH-compatible kernel. This completes the procedure.<\/p>\n\n\n\n
# uname -r\n4.18.0-372.9.1.el8.x86_64<\/code><\/pre>\n\n\n\n<\/div>\n\n\n\n
4. Conclusion<\/h2>\n\n\n\n
In this article, we have focused on the differences between CentOS and RHEL. In fact, they are almost the same in normal use. If you are told that the installed environment is CentOS, you may not notice it.<\/p>\n\n\n\n
However, even though the basic parts are the same as an RHEL-compatible distribution, Oracle Linux has a variety of peripheral tools for enterprises. It also has unique features like Ksplice that allow you to apply patches without rebooting. Now that CentOS has changed to CentOS Stream, Oracle Linux is one of the most trusted RHEL-compatible distributions. Why not give it a try?<\/p>\n","protected":false},"excerpt":{"rendered":"
Previously, we explained what a RHEL-compatible distribution is and the features of Oracle Linux. This time, w […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[7],"class_list":["post-360","post","type-post","status-publish","format-standard","hentry","category-knowledge-base","tag-linux"],"_links":{"self":[{"href":"https:\/\/oracle.human-design.jp\/en\/wp-json\/wp\/v2\/posts\/360","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oracle.human-design.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/oracle.human-design.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/oracle.human-design.jp\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oracle.human-design.jp\/en\/wp-json\/wp\/v2\/comments?post=360"}],"version-history":[{"count":10,"href":"https:\/\/oracle.human-design.jp\/en\/wp-json\/wp\/v2\/posts\/360\/revisions"}],"predecessor-version":[{"id":559,"href":"https:\/\/oracle.human-design.jp\/en\/wp-json\/wp\/v2\/posts\/360\/revisions\/559"}],"wp:attachment":[{"href":"https:\/\/oracle.human-design.jp\/en\/wp-json\/wp\/v2\/media?parent=360"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oracle.human-design.jp\/en\/wp-json\/wp\/v2\/categories?post=360"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oracle.human-design.jp\/en\/wp-json\/wp\/v2\/tags?post=360"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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