Software Update: CentOS 6.7

CentOS is an open source operating system based on Red Hat Enterprise Linux that is designed for use in enterprise environments. The name is an abbreviation of Community Enterprise Operating System. Unlike RHEL, CentOS is free to use. In terms of popularity, CentOS has been on the top of the list in the last twelve months seventh place. A new version of CentOS appears every two years, which is then provided with updates for seven years. A little over a year ago, version 7.0 of CentOS was released and now another update from the 6.x branch has appeared. The full release notes for this release are here to find. In short, these are the main changes:

Major changes:

• 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 clofter 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 4.2.8.2
• 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 rebuilding
• the package yum-plugin-downloadonly is now superseded by the main yum package, as the feature has been integrated