centOS 7 to 8 upgrade Hint

yum update   yum install epel-release -y   yum install rpmconf yum-utils   rpmconf -a   package-cleanup --leaves   package-cleanup --orphans   yum install dnf   dnf -y remove yum yum-metadata-parser dnf remove yum yum-metadata-parser   rm -Rf /etc/yum   dnf -y upgrade   dnf -y upgrade http://mirror.centos.org/centos/8/BaseOS/x86_64/os/Packages/centos-release-8.0-0.1905.0.9.el8.x86_64.rpm   dnf -y upgrade https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm   dnf […]

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Mac : raid 10 Hint

$ diskutil appleRAID list   diskutil createRAID stripe RAID10_Volume_Name JHFS+ UUID_OF_MIRROR_ARRAY1 UUID_OF_MIRROR_ARRAY2   diskutil appleRAID add spare UUID_OF_NEW_HARD_DRIVE UUID_OF_RAID_ARRAY   diskutil appleRAID add member UUID_OF_NEW_HARD_DRIVE UUID_OF_RAID_VOLUME   diskutil appleRAID repairMirror      

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