CentOS 6.9 has been released, If you are using older version 6.x release of CentOS operating system, this article will help to upgrade CentOS to latest release 6.8. This new release has lots of security changes and updates to packages. Currently, my server is running CentOS 6.7. Follow the below steps to upgrade it.
Step 1 – Check Current CentOS Release/etc/redhat-release is the file having the current version of CentOS running on your system. Use following command to check the current release.
Upgrade CentOS to Latest Release:
Following are the steps to help you to upgrade CentOS to the latest release. Before upgrading centos make sure you have taken backup of all your data to a remote location.
For you reference, first..below the items, you may need to first. It may be there is more database. So take a backup of all your data first.
Step 2 – Backup Important Data
Below is few suggested items to take backup.
- Backup all databases ( MySQL, PostgreSQL, etc.. )
- Backup all configuration files ( Apache, PHP, MySQL, DNS and Other services )
- Backup all websites data running in webserver
- Backup other service if any running on system
Step 3 – Upgrade CentOS
Use yum upgrade command to upgrade your current running system.
yum clean all yum update
After successful completion of above command just reboot your system.
reboot
Step 4 – Verify Upgrade
Finally, verify that your system has been upgraded successfully. To confirm it check the /etc/redhat-release file content.
cat /etc/redhat-release CentOS release 6.9 (Final)
yum -y upgrade
A simple
How to tie a system to a specific update of Red Hat Enterprise Linux with a temporary setting.
# yum clean all
# yum –releasever=6.6 update
Use the –releasever=X.Y option with yum to override the major.minor release versions, where X is the major release and Y is the minor release. Since it is not persistent, this option would need to be repeated for later executions of yum.
I had an old 6.4 that just won’t update with the regular yum update.
A simple
yum clean all
and then
yum update
worked like a charm. Thanks for sharing. 🙂
Can you show me how to perform the update offline?
My server is CentOS release 6.4 (Final) and it does not have access to the web or other Linux servers?
I have this
Running rpm_check_debug
ERROR with rpm_check_debug vs depsolve:
yum-plugin-fastestmirror is needed by yum-3.2.29-60.el6.centos.noarch
** Found 1 pre-existing rpmdb problem(s), ‘yum check’ output follows:
yum-3.2.29-43.el6.centos.noarch has missing requires of yum-plugin-fastestmirror
Why not use …
yum -y upgrade
it removes obsolete packages.