Update backup documentation

- Add general introductory information and advice
 - Add test restore step
 - Minor language fixes
 - Minor source formatting improvements
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Andrew David Wong 2020-08-31 15:40:11 -05:00
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Qubes Backup, Restoration, and Migration
========================================
With Qubes, it's easy to back up and restore your whole system, as well as to migrate between two physical machines.
With Qubes, it's easy and secure to back up and restore your whole system, as well as to migrate between two physical machines.
These functions are integrated into Qube Manager.
There are also two command-line tools available which perform the same functions: `qvm-backup` and `qvm-backup-restore`.
These functions are integrated into the Qube Manager.
There are also two command-line tools available that perform the same functions: `qvm-backup` and `qvm-backup-restore`.
It's extremely important to make regular backups of all the data you care about.
This is true of all computing, not just the use of Qubes.
Data loss can and does occur in myriad and unexpected ways.
A standard recommendation is to make backups at least weekly: three copies in two different formats, one off-site.
Creating a Backup
-----------------
1. Go to **Applications menu -> System Tools -> Backup Qubes**.
This brings up the **Qubes Backup VMs** window.
This brings up the **Qubes Backup VMs** window.
2. Move the VMs that you want to back up to the right-hand **Selected** column.
VMs in the left-hand **Available** column will not be backed up.
VMs in the left-hand **Available** column will not be backed up.
You may choose whether to compress backups by checking or unchecking the **Compress the backup** box.
Normally this should be left on unless you have a specific reason otherwise.
@ -52,11 +57,16 @@ VMs in the left-hand **Available** column will not be backed up.
**Warning: Saving the settings will result in your backup passphrase being saved in plaintext in dom0, so consider your threat model before checking this box.**
4. You will now see the summary of VMs to be backed up.
If there are any issues preventing the backup, they will be listed here and the **Next** button grayed out.
If there are any issues preventing the backup, they will be listed here and the **Next** button grayed out.
5. When you are ready, click **Next**.
Qubes will proceed to create your backup.
Once the progress bar has completed, you may click **Finish**.
Qubes will proceed to create your backup.
Once the progress bar has completed, you may click **Finish**.
6. Test restore your backup.
Follow the [restore procedure](#restoring-from-a-backup), selecting **Verify backup integrity, do not restore the data**.
This step is optional but strongly recommended.
A backup is useless if you can't restore your data from it, and you can't be sure that your backup is good until you try to restore.
Restoring from a Backup