CentOS 7.0 64bit
The CentOS image was officially applied and tested by Alibaba Cloud. The CentOS Linux distribution is a stable, predictable, manageable and reproducible platform derived from the sources of Red Hat Enterprise Linux (RHEL). CentOS conforms fully with the upstream vendor's redistribution policy and aims to be 100% functionally compatible with RHEL (CentOS mainly changes packages to remove upstream vendor branding and artwork). CentOS Linux is no-cost and free to redistribute.
CentOS-7 was released on Dec 12th, 2016. It contains a lot of bugfixes, updates and new functionality. Packages that have been modified by CentOS include abrt, anaconda, apache-commons-net,basesystem, chrony,compat-glibc, curl, dhcp, firefox, glusterfs, grub2, httpd, kernel etc.
We recommend reviewing the CentOS on wiki page at https://wiki.centos.org/Manuals/ReleaseNotes/CentOS7 for more details.