Upgrade from CentOS 6.5 to 7.0

• update yum

  # yum -y update
  

• install packages

  # yum -y install openscap pcre-devel libxml2-devel libxslt-devel
  # yum -y install m2crypto python-simplejson mod_wsgi
  

• fetch rpms

  # rpm -ihv http://dev.centos.org/centos/6/upg/x86_64/Packages/preupgrade-assistant-1.0.2-33.el6.x86_64.rpm
  # rpm -ihv http://dev.centos.org/centos/6/upg/x86_64/Packages/preupgrade-assistant-contents-0.5.13-1.el6.noarch.rpm
  # rpm -ihv http://dev.centos.org/centos/6/upg/x86_64/Packages/preupgrade-assistant-ui-1.0.2-33.el6.x86_64.rpm
  # rpm -ihv http://dev.centos.org/centos/6/upg/x86_64/Packages/python-rhsm-1.9.7-1.el6.x86_64.rpm
  # rpm -ihv http://dev.centos.org/centos/6/upg/x86_64/Packages/redhat-upgrade-tool-0.7.22-1.el6.noarch.rpm
  

• RHEL setting

  # preupg -s RHEL6_7
  

• upgrade

  # redhat-upgrade-tool-cli --network 7.0 --instrepo http://mirror.bytemark.co.uk/centos/7/os/x86_64/ --force –-nogpgcheck
  

• reboot

  # shutdown -r now