8.2→8.3

# export VER=8.3
# wget https://updates.xcp-ng.org/8/xcp-ng-8.3.repo -O  xcp-ng-8.3.repo
# cp xcp-ng-8.3.repo /etc/yum.repos.d/xcp-ng.repo
# yum clean metadata
# yum update
# reboot

/etc/yum.repos.d/xcp-ng.repo のバージョンを書き換えてyum upgrade¹⁾
例：8.1 → 8.2
この内容だと6か所

[xcp-ng-base]
name=XCP-ng Base Repository
baseurl=http://mirrors.xcp-ng.org/8/8.2/base/x86_64/ http://updates.xcp-ng.org/8/8.2/base/x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-xcpng
 
[xcp-ng-updates]
name=XCP-ng Updates Repository
baseurl=http://mirrors.xcp-ng.org/8/8.2/updates/x86_64/ http://updates.xcp-ng.org/8/8.2/updates/x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-xcpng
 
[xcp-ng-testing]
name=XCP-ng Testing Repository
baseurl=http://mirrors.xcp-ng.org/8/8.2/testing/x86_64/ http://updates.xcp-ng.org/8/8.2/testing/x86_64/
enabled=0
gpgcheck=1
repo_gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-xcpng