Changes between Initial Version and Version 1 of ConvertRedHatEnterpriseLinuxToCentOS

Timestamp:

May 9, 2009 5:08:50 AM (16 years ago)

Author:

iva

Comment:

--

ConvertRedHatEnterpriseLinuxToCentOS

@@ +1 @@
+== Convert Red Hat Enterprise Linux (RHEL) System To CentOS ==
+
+To convert a server from Red Hat Enterprise Linux to CentOS one needs to:
+
+1. Replace the ''comps'' package;
+2. Update the ''initscripts'' package;
+3. Replace the ''redhat-release'' package with ''centos-release'';
+4. Update the ''rpmdb-redhat'' package;
+5. Install the ''Yellowdog Updater Modified (YUM)''.
+
+Practical examples follow. (Keep in mind that these upgrades were all performed in spring of 2009, so newer versions of the packages mentioned may be available by now.)
+
+
+=== RHEL 3 to CentOS 3 ===
+
+{{{
+# cat /etc/redhat-release
+Red Hat Enterprise Linux ES release 3 (Taroon Update 5)
+#
+# url=http://mirror.centos.org/centos/3.9/os/i386/RedHat/RPMS
+#
+# rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-3
+#
+# rpm -e comps-3ES-0.20070529
+# rpm -i $url/comps-3.9centos.0-0.20070617.i386.rpm
+#
+# rpm -q initscripts
+initscripts-7.31.22.EL-2
+# rpm -F $url/initscripts-7.31.31.EL-1.centos.1.i386.rpm
+#
+# rpm -e redhat-release-3ES-13.5.1
+# rpm -i $url/centos-release-3-9.1.i386.rpm
+#
+# rpm -q rpmdb-redhat
+rpmdb-redhat-3-0.20070529
+# rpm -F $url/rpmdb-redhat-3.9-0.20070703.i386.rpm
+#
+# rpm -i $url/yum-2.0.8-2.centos3.noarch.rpm
+# rpm -i $url/centos-yumconf-1-11.noarch.rpm
+# rpm -i $url/centos-yumcache-3.9-0.20070703.noarch.rpm
+#
+# cat /etc/redhat-release
+CentOS release 3.9 (Final)
+#
+}}}
+
+=== RHEL 4 to CentOS 4 ===
+
+{{{
+# cat /etc/redhat-release
+Red Hat Enterprise Linux ES release 4 (Nahant Update 7)
+#
+# url=ftp://linux-repo/pub/centos/4/os/i386
+#
+# rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-4
+#
+# rpm -e comps-4WS-0.20080711
+# rpm -i $url/disc1/CentOS/RPMS/comps-extras-10.1-1.noarch.rpm
+# rpm -i $url/disc1/CentOS/RPMS/comps-4.7CENTOS-0.20080805.i386.rpm
+#
+# rpm -q initscripts
+initscripts-7.93.33-1.el4
+# rpm -U --force $url/disc1/CentOS/RPMS/initscripts-7.93.33-1.centos4.i386.rpm
+#
+# rpm -e --nodeps redhat-release-4WS-8.0.el4_7.1
+# rpm -i $url/disc1/CentOS/RPMS/centos-release-4-7.i386.rpm
+#
+# rpm -e rpmdb-redhat-4-0.20080711
+# rpm -i $url/disc1/CentOS/RPMS/rpmdb-CentOS-4.7-0.20080805.i386.rpm
+#
+# rpm -i $url/disc1/CentOS/RPMS/sqlite-3.3.6-2.i386.rpm
+# rpm -i $url/disc1/CentOS/RPMS/python-elementtree-1.2.6-5.el4.centos.i386.rpm
+# rpm -i $url/disc1/CentOS/RPMS/python-sqlite-1.1.7-1.2.1.i386.rpm
+# rpm -i $url/disc1/CentOS/RPMS/python-urlgrabber-2.9.8-2.noarch.rpm
+# rpm -i $url/disc1/CentOS/RPMS/yum-2.4.3-4.el4.centos.noarch.rpm \
+    $url/disc1/CentOS/RPMS/yum-metadata-parser-1.0-8.el4.centos.i386.rpm
+#
+# cat /etc/redhat-release
+CentOS release 4.7 (Final)
+#
+}}}
+
+=== RHEL 5 to CentOS 5 ===
+
+{{{
+# cat /etc/redhat-release
+Red Hat Enterprise Linux Server release 5.1 (Tikanga)
+#
+# url=http://mirror.centos.org/centos/5/os/i386/CentOS
+#
+# rpm -e rhel-instnum rhn-check rhn-client-tools rhnlib rhnsd rhn-setup yum-rhn-plugin
+# rpm -e yum-updatesd
+#
+# rpm -e redhat-release-notes-5Server-9
+# rpm -e --nodeps redhat-release-5Server-5.1.0.2
+#
+# rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
+#
+# rpm -i $url/centos-release-5-2.el5.centos.i386.rpm $url/centos-release-notes-5.2-2.i386.rpm
+#
+# rpm -F $url/initscripts-8.45.19.EL-1.el5.centos.1.i386.rpm
+#
+# rpm -i $url/python-iniparse-0.2.3-4.el5.noarch.rpm
+# rpm -F $url/yum-3.2.8-9.el5.centos.1.noarch.rpm $url/yum-metadata-parser-1.1.2-2.el5.i386.rpm
+# rpm -i $url/yum-fastestmirror-1.1.10-9.el5.centos.noarch.rpm
+# rpm -i $url/gamin-python-0.1.7-8.el5.i386.rpm
+# rpm -i $url/yum-updatesd-0.9-2.el5.noarch.rpm
+#
+# cat /etc/redhat-release
+CentOS release 5.3 (Final)
+#
+}}}