Wed 02 May 2018
I have tried to suggest update of Migration Guide for RHEL7→CentOS7 migration, but apparently after CentOS was bought by Red Hat, there is not enough desire to document such migration, ehm ehm. So, just recording this for posteriority:
URLBASE=http://mirror.centos.org/centos/7/os/x86_64/Packages cd /tmp mkdir TMP cd TMP wget $URLBASE/centos-indexhtml-7-9.el7.centos.noarch.rpm \ $URLBASE/centos-release-7-4.1708.el7.centos.x86_64.rpm \ $URLBASE/yum-3.4.3-154.el7.centos.noarch.rpm \ $URLBASE/yum-plugin-fastestmirror-1.1.31-42.el7.noarch.rpm subscription-manager remove --all yum remove rhnlib abrt-plugin-bugzilla redhat-release-notes\* \ subscription-manager\* rpm -e --nodeps redhat-release-workstation redhat-indexhtml for dir in /usr/share/redhat-release\;\* ; do rm -fv $dir ; done rmdir /usr/share/redhat-release rpm -Uvh * yum clean all && rm -rf /var/cache/yum yum upgrade yum upgrade yum distro-sync package-cleanup --orphans cd .. && rm -rf TMP
I am not sure what’s the deal with /usr/share/redhat-release*, but it is just necessary to get rid of all variants of such directory.