Upgrade CentOS 7.x to latest version

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Usually, you want to use the last version of the operating system and if it is true you will update your OS early or later. In this article, you can found a simple and small instruction to update Centos 7 from 7.x to the latest version (now it is 7.4) See CentOS 7.4 release note for more information about changes.


Check the current version

# cat /etc/redhat-release
CentOS Linux release 7.3.1611 (Core)

Upgrading is the same as the update option with -obsoletes flag. Before upgrading purge all old cache and download a new one. And next, you can upgrade OS.

yum clean all
yum makecache
yum -y upgrade

Below is described info that I got (I left only main info)

# yum clean all
Cleaning up everything
Cleaning up list of fastest mirrors

# yum makecache
Metadata Cache Created

# yum -y upgrade

After the upgrade process has completed seeing changes reboot a system

systemctl reboot

And repeat to check the current version of the system

# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)

Of course, don’t do this procedure on a system with users.

Additional information