CentOS 6.7 Release notes & upgrade steps

CentOS community announced the new release of CentOS 6.7 on 7 August, 2015. In this release lot of bug has been fixed and also some major changes with some deprecated features has been done. They have planned to combine all repository into one place for upstream release to make it easier for end users. such as Workstation, server, and minimal installs can all be done from the combined repository.

There are many fundamental changes in this release, compared with the past CentOS Linux 6 releases. So careflly read the release notes and do upgrade your system.

What’s New in CentOS 6.7

  • sssd has a number of new capabilities
  • Support for udev rules to restrict removable media to be mounted read-only for security
  • LVM caching is now fully supported
  • New package clufter can be used for analyzing and transforming cluster configuration formats
  • SSLv3 and older insecure protocols are disabled by default, and various packages now have more configuration options to select the desired protocols
  • vim has been rebased to version 7.4, with improvements to undo and regular expressions
  • libreoffice has been upgraded to
  • The KVM hypervisor can now handle up to 240 virtual CPUs per virtual machine
  • IPv6 IP sets are now allowed in firewall rules
  • squid has been rebased to version 3.1.23 and now supports HTTP/1.1 POST and PUT responses with no message body
  • mdadm has been rebased to version 3.3.2, improving support for RAID level migrations and automatic array
  • the package yum-plugin-downloadonly is now superseded by the main yum package, as the feature has been integrated
  • Deprecated Features (python-qmf, python-qpid, qpid-cpp, qpid-qmf, qpid-tests, qpid-tools, ruby-qpid, saslwrapper)
  • All packages updated to latest releases
  • For complete change log

Note :1) Take a backup of your important data (web content, mysql database, all service configuration settings) before upgrading, If anything goes wrong we can reinstall freshly and restore the data.
2) The upgrade will take 10-20 mins based on your Internet connection and list of package which you install.

1) Checking current version of my server

Use the below command to check which version of CentOS server currently running.

[email protected] [~]# cat /etc/redhat-release
CentOS release 6.6 (Final)

2) Upgrading CentOS from 6.x to 6.7

Use the below command to upgrade your system to latest version.

# Removing cached packages and headers #
[email protected] [~]# yum clean all

# Upgrading the system #
[email protected] [~]# yum -y update
[email protected] [~]# yum -y upgrade

# Reboot your system #
[email protected] [~]# reboot

3) Checking Upgraded version of my server

Use the below command to check whether the CentOS version upgraded.

[email protected] [~]# cat /etc/redhat-release
CentOS release 6.7 (Final)

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Vinoth Kumar

Vinoth Kumar has 3.5+ years of experience in Linux server administration & RHEL certified professional. He is currently working as a Senior L2 Linux Server administrator.

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