CentOS6升级到7
修改源
# cat >> /etc/yum.repos.d/upgradetool.repo << EOF [upg] name=CentOS-\$releasever - Upgrade Tool baseurl=http://dev.centos.org/centos/6/upg/x86_64/ gpgcheck=1 enabled=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 EOF
# yum install redhat-upgrade-tool preupgrade-assistant-contents
# preupg -s CentOS6_7
看看检查结果，是否有不兼容的部分
# review result.html
# rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7
开始升级
# centos-upgrade-tool-cli --network 7 --instrepo=http://mirror.centos.org/centos/7/os/x86_64/