The steps described herein do not depict the official upgrade and this should not be applied to a production server yet.<\/p>\n
PRE TASKS<\/strong><\/p>\n Step 1: Install the EPEL Repository<\/strong> # yum install epel-release -y<\/p><\/blockquote>\n Step 2: Install yum-utils Tools<\/strong> # yum install yum-utils<\/p><\/blockquote>\n Thereafter, you need to resolves RPM packages by executing the command.<\/p>\n # yum install rpmconf Next, perform a clean-up of all the packages you don\u2019t require.<\/p>\n # package-cleanup –leaves INSTALL PRE-UPGRADE TOOL<\/strong> Step 3: Install the dnf in CentOS 7<\/strong> # yum install dnf<\/p><\/blockquote>\n Then, you need to remove the yum package manager using the command.<\/p>\n # dnf -y remove yum yum-metadata-parser CENTOS UPGRADE<\/strong><\/p>\n Step 4: Upgrading CentOS 7 to CentOS 8<\/strong> # dnf upgrade<\/p><\/blockquote>\n Next, install CentOS 8 release package using dnf as shown below. This will take a while.<\/p>\n # dnf install http:\/\/mirror.centos.org\/centos\/8\/BaseOS\/x86_64\/os\/Packages\/{centos-linux-repos-8-2.el8.noarch.rpm,centos-linux-release-8.4-1.2105.el8.noarch.rpm,centos-gpg-keys-8-2.el8.noarch.rpm}<\/p><\/blockquote>\n Next, upgrade the EPEL repository.<\/p>\n # dnf -y upgrade https:\/\/dl.fedoraproject.org\/pub\/epel\/epel-release-latest-8.noarch.rpm<\/p><\/blockquote>\n After successfully upgrading the EPEL repository, remove all the temporary files.<\/p>\n # dnf clean all<\/p><\/blockquote>\n Remove the old kernel core for CentOS 7.<\/p>\n # rpm -e `rpm -q kernel`<\/p><\/blockquote>\n Be sure to remove conflicting packages.<\/p>\n # rpm -e –nodeps sysvinit-tools<\/p><\/blockquote>\n Thereafter, launch the CentOS 8 system upgrade as shown.<\/p>\n # dnf -y –releasever=8 –allowerasing –setopt=deltarpm=false distro-sync<\/p><\/blockquote>\n INSTALL NEW KERNEL<\/strong><\/p>\n Step 5: Install the New Kernel Core for CentOS 8<\/strong><\/p>\n To install a new kernel for CentOS 8, run the command.<\/p>\n # dnf -y install kernel-core<\/p><\/blockquote>\n Finally, install CentOS 8 minimal package.<\/p>\n # dnf -y groupupdate “Core” “Minimal Install”<\/p><\/blockquote>\n Now you can check the version of CentOS installed by running.<\/p>\n # cat \/etc\/redhat-release<\/p><\/blockquote>\n Disclaimer : Create a recent backup of the system. This is an unofficial , unsupported procedure !<\/strong><\/p>\n source: https:\/\/www.tecmint.com\/upgrade-centos-7-to-centos-8\/<\/p>\n","protected":false},"excerpt":{"rendered":" The steps described herein do not depict the official upgrade and this should not be applied to a production server yet. PRE TASKS Step 1: Install the EPEL Repository install the EPL repository by running: # yum install epel-release -y Step 2: Install yum-utils Tools After successfully installing EPEL, install yum-utils by running the command\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-1326","post","type-post","status-publish","format-standard","hentry","category-tutorial"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t
\ninstall the EPL repository by running:<\/p>\n
\nAfter successfully installing EPEL, install yum-utils by running the command below:<\/p>\n
\n# rpmconf -a<\/p><\/blockquote>\n
\n# package-cleanup –orphans<\/p><\/blockquote>\n
\n<\/p>\n
\nNext step is installing dnf package manager which is the default package manager for CentOS 8<\/p>\n
\n# rm -Rf \/etc\/yum<\/p><\/blockquote>\n
\nWe are now ready to upgrade CentOS 7 to CentOS 8, but before we do so, upgrade the system using the newly install dnf package manager.<\/p>\n