CentOS 7 Released See whats new and whats changed before upgrading

Posted on  7/8/2014

CentOS 7 is released , CentOS is derived from RHEL is it has most best features of RHEL 7 . with this release CentOS team announced new version numbering system they are going to use Month and Year ( like this is CentOS7 1406 ) which will help them keep updated packages and there are many changes the made in CentOS7 so please read about them before upgrading otherwise you will be endup with broken system .

Screen Shot 2014-07-08 at 7.48.07 am
Screen Shot 2014-07-08 at 7.48.07 am

From :


CentOS 7.0-1406 introduces a new numbering scheme that we want to
further develop into the life of CentOS-7. The 0 component maps to the
upstream realease, whose code this release is built from. The 1406
component indicates the monthstamp of the code included in the release
( in this case, June 2014 ). By using a monthstamp we are able to
respin and reissue updated media for things like container and cloud
images, that are regularly refreshed, while still retaining a
connection to the base distro version.

Major Changes:

1 .Kernel updated to 3.10.0
2. Support for Linux Containers
3. Open VMware Tools and 3D graphics drivers out of the box
4. OpenJDK-7 as default JDK
5. In Place Upgrade from 6.5 to 7.0 (as already mentioned)
6. LVM-snapshots with ext4 and XFS
7. Switch to systemd, firewalld and GRUB2
8. XFS as default file system
9. iSCSI and FCoE in kernel space
10. Support for PTPv2
11. Support for 40G Ethernet Cards
12. Supports installations in UEFI Secure Boot mode on compatible hardware

Before you rush to 7.0 after 6.5 – things you are going to have to learn because they changed many things :
grub2 replaces grub, systemd completely replaces init.d
(many people dislike systemd, it is somewhat anti-linux in nature)
No more easy editing/understanding grub.conf
No more easy to understand /etc/init.d
No more text log files for system log (journalctl instead)
Watch out for default XFS filesystem instead of EXT4 because it is slower in real world use for databases, etc.
CentOS 6.x will be supported until 2020


The size, sha256 sums and torrents for the ISO files,:

The iso files are also available for direct download from

Please Note :

The installer needs at least 406MB of memory to work. On systems with less memory then 406MB the installation will terminate with a fatal error. 512MB is the minimum memory requirement for CentOS-7.

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