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List of Contents

• GRUB — GRand Unified Bootloader
• Recovery Mode
• Root Password
• Check Partitiion
• Check and Repair

It is always a good idea to back up the last few OVA (or UTM) files on an external disk. If your host has problems, those OVA files can be run on another host.

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GRUB — GRand Unified Bootloader

If you encounter problems with the disk, it is recommended to boot with “Recovery Mode”, and repairing it.

• Select: “Advanced options for Debian/Linux”

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Recovery Mode

• Select: “(Recovery Mode)”

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Root Password

• Give root password for maintenance.
• Enter “clear” to clear the screen.

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Check Partition (root mode)

• lsblk (list block devices)
  • Check if /dev/sda1, /dev/sdb1, /dev/sdb2 is mounted properly
  • for UTM, replace “sdb1” and “sdb2” with “vdb1” and “vdb2”.

lsblk

• df (disk space usage)
  • Sometimes, instead of /dev/sda1, the root is mounted to /dev/sdb1
  • for UTM, replace “sdb1” and “sdb2” with “vdb1” and “vdb2”.

df

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Check and Repair (root mode)

• umount (unmount)
  • for UTM, replace “sdb1” and “sdb2” with “vdb1” and “vdb2”.

umount -v /dev/sdb1

umount -v /dev/sdb2

• fsck (check and repair a filesystem)
  • for UTM, replace “sdb1” and “sdb2” with “vdb1” and “vdb2”.

fsck -y -f /dev/sdb1

fsck -y -f /dev/sdb2

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