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Steps for a sideways migration from RH to Centos. Details will depend on the distributions. See https://www.pickysysadmin.ca/2014/07/15/how-to-convert-rhel-6-x-to-centos-6-x or https://www.pickysysadmin.ca/2014/04/27/how-to-convert-rhel-5-x-to-centos-5-x Also note: https://wiki.centos.org/HowTos/MigrationGuide cd /etc cp yum.conf yum_rh5_dead.conf rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5 rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/centos-release-notes-5.11-0.x86_64.rpm http://mirror.centos.org/centos/5/os/x86_64/CentOS/centos-release-5-11.el5.centos.x86_64.rpm rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm http://mirror.centos.org/centos/5/os/x86_64/CentOS/yum-3.2.22-40.el5.centos.noarch.rpm rpm -Uhv http://mirror.centos.org/centos/5/os/x86_64/CentOS/yum-merge-conf-1.1.16-21.el5.centos.noarch.rpm rpm -e --nodeps yum-updatesd-0.9-6.el5_10.noarch rpm -Uhv http://mirror.centos.org/centos/5/os/x86_64/CentOS/yum-updatesd-0.9-6.el5_10.noarch.rpm rpm -e --nodeps rhn-client-tools rhn-setup rhn-check rhnsd redhat-logos redhat-release-notes rhel-instnum rpm -e --nodeps yum-rhn-plugin rpm -e --allmatches myproxy-server-6.1.16-1.el5+gt6 myproxy-server-6.1.16-1.el5+gt6 myproxy-libs-6.1.16-1.el5+gt6 myproxy-admin-6.1.16-1.el5+gt6 myproxy-admin-6.1.16-1.el5+gt6 myproxy-6.1.16-1.el5+gt6 myproxy-libs-6.1.16-1.el5+gt6 yum upgrade

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