Backup Linux OS

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基本思路：先拷贝整个操作系统到目标硬盘，修改挂载的分区，在目标硬盘上安装引导。

Copying

  • Mount the destination partitions

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    sudo mount /dev/sdbX /mnt # mount sdbX for example

  • Copy the entire os to the destination partitions

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    rsync -avxHAX / /mnt

Configuration

  • Find the destination partition’s UUID

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    ls -l /dev/disk/by-uuid/

  • Change uuid in the file /mnt/etc/fstab

Install Grub

  • Bind some system directories needed by grub

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    mount --bind /proc /mnt/proc
    mount --bind /sys /mnt/sys
    mount --bind /dev /mnt/dev
    mount --bind /run /mnt/run

  • Install grub on destination hard drive

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    chroot /mnt
    grub-install /dev/sdb
    update-grub2