54 lines
2.1 KiB
Markdown
54 lines
2.1 KiB
Markdown
# snap-sync
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## About
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This bash script sends incremental snapshots to another drive for backing up
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data. Plug in and mount any btrfs-formatted device you want your system to be
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backed up to (like a USB drive). When you run the script you will be prompted
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to select a mounted btrfs device.
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The script iterates through all snapper configurations. For each configuration
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it creates a new local snapshot. If you have never synced to the specified
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device you will be prompted to enter a directory on the device where the backup
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snapshots will go. Additionally you are shown the location of the backed up
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snapshot. If you have performed a backup to this device before, only the changes
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since the last backup have to be sent.
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## Requirements
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snapper is required.
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## Example output
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# snap-sync
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Selected a mounted BTRFS device to backup to.
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1) 43cedfb6-8775-43be-8abc-ee63bb92e10e (/)
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2) 43cedfb6-8775-43be-8abc-ee63bb92e10e (/.snapshots)
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3) 43cedfb6-8775-43be-8abc-ee63bb92e10e (/home)
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4) 7360922b-c916-4d9f-a670-67fe0b91143c (/run/media/wes/backup)
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0) Exit
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Enter a number: 4
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You selected the disk with UUID 7360922b-c916-4d9f-a670-67fe0b91143c.
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At 'home' configuration
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Backup location: /run/media/wes/backup/acer-c720/home/1097/
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Continue (y/n)? y
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At subvol /home/.snapshots/1097/snapshot
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At 'root' configuration
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Backup location: /run/media/wes/backup/acer-c720/root/2288/
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Continue (y/n)? y
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At subvol //.snapshots/2288/snapshot
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Done!
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The related snapshots from this on the local machine are for `home`:
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single | 1097 | | Sat 01 Oct 2016 07:48:40 AM CDT | root | | latest incremental backup | backupdir=acer-c720, uuid=7360922b-c916-4d9f-a670-67fe0b91143c
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and for `root`:
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single | 2288 | | Sat 01 Oct 2016 07:50:56 AM CDT | root | | latest incremental backup | backupdir=acer-c720, uuid=7360922b-c916-4d9f-a670-67fe0b91143c
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As you can see the userdata column for snapper is used to keep track of these
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snapshots for the next time the script is run so that only the changes will need
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to be sent.
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