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Questions tagged [snapshot]

Snapshots allow users to create images of a specified filesystem. Use this tag if you have problems or questions about creating Snapshots in Ubuntu.

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86 views

20.04 Add grub-entry to boot a btrfs snapshot

I have install btrfs on my 20.04 system and I created a snapshot named @-2021-04-10 of the root subvolumne named @. Now a want to add a grub menu entry to boot this snapshot. How can I add such a boot ...
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1answer
42 views

Backup system and restore onto new machine

Hosted Virtual Computer Streaming via NoMachine OS: Ubuntu MATE 20.10 x86_64 Kernel: 5.8.0-44-generic Packages: 2576 (dpkg), 9 (snap) Shell: bash 5.0.17 DE: MATE Theme: Ambiant-MATE-Dark [GTK2/3] ...
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16 views

LVM Snapshot size

I'm a little confused. When creating a snapshot of an existing LVM: Do the LVM and the snapshot need to be in the same volume group Is the size of the snapshot supposed to be as big as the LVM itself?...
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1answer
145 views

Copying TimeShift bkp from HDD to HDD maxed my OS SSD to 0 bytes free and bricked it. Need a fail-safe way to copy without compromising the OS SSD

The factors involved: OS: Ubuntu 20.04.1 LTS running on an SSD /sdb2 119GB with 72GB of free space File to transfer: 44.8GB TimeShift protected and locked snapshot Source of folder: 4TB internal HDD ...
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1answer
698 views

Ubuntu 20.04 zfs grub rollback snapshots

I'm interested in teh ZFS snapshot feature, So I deployed 20.04 VM with ZFS. I created a snapshot to test how the rollback procedure works. sudo snapshot -r rpool@SNAP1 When then I created and ...
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1answer
98 views

Prune BTRFS incremental snapshots

I'm pretty new to BTRFS. I managed to do a readonly snapshot of my system and send/receive it to an external drive (snapshotting it again as rw so I can even boot it): so far so good. I know that, in ...
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72 views

Upgrade to Ubuntu 20.10 without btrfs snapshot

Currently on Ubuntu 20.04. I want to upgrade to Ubuntu 20.10 without Ubuntu making a btrfs snapshot as part of the process. How can I do this?
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1answer
822 views

Is it safe to delete /var/lib/snapd/snapshots?

I had to reinstall Spotify because of an issue, which is now resolved but something else came up. I was notified that my root partition was filling up and I realised that in /var/lib/snapd/snapshots, ...
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214 views

Zsys autosnapshots in Ubuntu 20.04.1 LTS

I have installed Ubuntu 20.04.1 LTS using the "advanced" ZFS installer. It appears that the 20 minute snooze between Zsys autosnapshots in 20.04 LTS has been eliminated. This means that ...
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39 views

how to create ubuntu distro from virtual box snapshot and install it as 2nd OS?

i have ubuntu running in vbox in win10. I did some actions -installed software and made snapshot. Now is it possible to make a distro with all that saved work from the snapshot? snapshot->iso use ...
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117 views

How to rollback a btrfs snapshot for root [ / ] after failed system update

I tried updating from 18.04 to 20.04 but something went wrong and the installer told me that my system could have ended up unusable. I think I know the cause (a bunch of third party repos). ...
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82 views

LVM snapshot merge is slow and somethims gets stuck

I am having some issues related to lvm snapshot merge. When running lvconvert --merge <snasphot> on ubuntu 14.04.6 (kernel 3.19.0-80-generic) everything worked fine. Lvm version is: LVM ...
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1answer
207 views

Do parent file system snapshot reference it's children datasets data or only their onw data?

Data is referenced in as many snapshots you take and it will be deleted from disk only if you delete all snapshots that referenced said data as well as the data from the running volume, this holds ...
2
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1answer
2k views

Ubuntu 20.04 thinks it's out of free space, but it isn't

I started to get "not enough free space" errors when trying to copy files, and at some point I had trouble booting and did a ZFS rollback. I still get space errors despite (according to df and du ...
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4answers
1k views

How can I automatically create a Btrfs Snapshot before updating my system?

I've installed Ubuntu 20.04 on a Btrfs root-partition for its snapshot functionality. To keep it as simple as possible, I would like to integrate the creation of a Btrfs snapshot into my upgrade-...
2
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1answer
761 views

ubuntu 20.04 can “ zfs-auto-snapshot” v.s. zsys

The package zfs-auto-snapshot is not installed by default. zsys is a minimally documented/incomplete snapshot management, which is the default. In particular it is unclear how and when snapshots are ...
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50 views

Create backup of filesystem

I have LVM set up on my machine with one 8G (gigabytes) swap LV (logical volume) and a ~250G ext4 LV that is the root filesystem. I have installed and heavily configured some software, in the end only ...
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39 views

Snapshot a directory

I have an Ubuntu 18.04 (upgrading to 20.04 when released) laptop with a nice MicroSD slot. I'd like to setup a process to have snapshots of a particular home directory, let's say ~/code, to be done ...
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121 views

Is it a BTRFS Bug, a BTRBK bug or is my HDD dying?

I'm using a BTRFS setup in my home server, where I'm having 3 disks in a btrfs-raid and a fourth disk is used to receive daily backup snapshots via BTRBK. Some days ago I noticed, that BTRBK was ...
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0answers
80 views

“no dataset available”, when running script

I'm new to zfs and I started making a script to build on to eventually (hopefully) become an automatic backup script for my server. But when I try to run my script, it echoes "no datasets available". ...
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1answer
424 views

Full ZFS Snapshot on Ubuntu 19.10

I have my default ZFS installation from a clean install of Ubuntu 19.10 and I want a full snapshot of the entire system. NAME USED AVAIL REFER ...
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0answers
245 views

How make snapshot of dedicated server?

What software or utility can help make a snapshot of a production Ubuntu system with all utilities and parameters? I would like to be able to simply restore this image with all data and statements, ...
10
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3answers
26k views

What's the difference between Rsync & BTRFS Snapshots

Context: I was thinking about making snapshot for safety reasons, so I downloaded Timeshift but once installed, I have to make a choice between Rsync and BTRFS Snapshots I already read the ...
2
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1answer
1k views

Continues free snapshot backup manager for ubuntu?

Is there a easy-to-use full-system snapshot manager for ubuntu? Use-case: After a complete system breakdown (e.g. rm -rf /bin) the ability to restore the previous system state. I tried to use rsync, ...
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1answer
1k views

Automatically recover previous state after reboot

I need to install Ubuntu on a system and also need that that system automatically recovers to a default state previously configured. Can you recommend a software that can do that? I can use a live ...
1
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1answer
443 views

LXD ZFS snapshot creation slows down as number of snapshots increases

Ubuntu 18.04 LTS - LXD Ubuntu launch using loopback ZFS (about 400MB) # lxc launch ubuntu:16.04 test -s ianzfspool (I have one other idle multi-GB container using the same ianzfspool.) I have lots ...
3
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1answer
4k views

What are the main differences between a system snapshots (Timeshift) and partition images (saved as iso)?

Following comments under this answer of mine I became interested in the question whether the best option for me in order to back-up a system is a partition back-up as described at the linked answer or ...
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7answers
4k views

Take screenshots in background silently for archive purposes

During my work, I often try out tools of different complexity and develop usage and integration scenarios. I use Ubuntu 18.04 LTS. Sometimes if things get really complicated, I am not always sure ...
2
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1answer
731 views

Timeshift 18.9.1 - Cant add Comments to btrfs snapshots

I often use timeshift snapshots with btrfs (and also snapper on servers). Bot have a comments field for each snapshot. With snapper, i can add a comment as a command-line option. Timeshift also adds ...
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1answer
85 views

hashsum is not available- unable to get source of package [closed]

I want to get the source of package wirehshark for year 2009. I am doing that by editing source.list according to Debian snapshot information. After doing sudo apt-get update. I tried: sudo apt-get ...
3
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1answer
532 views

How to repair a broken apt-btrfs-snapshot in kubuntu 18.04?

After installing Kubuntu 18.04 on a Thinkpad W520 on btrfs over LUKS I came to the activation of the automatic APT snapshots. Here it shows up that any call of apt-btrfs-snapshot crashes, complaining ...
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1answer
51 views

take snaps when entered wrong password

hi a i am using ubuntu 16.04 LTS if anybody can help me with this, i want my webcam to take snaps of the person who is trying to enter my computer.it would be best if someone try to explain it in ...
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1answer
960 views

qemu/kvm snapshot with non-usb device

I have a fully-working QEMU virtual machine (ubutu host, XP guest). I cannot save the machine state into a snapshot because I have a PCIe card attached to the VM. The error message says «Requested ...
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101 views

Screencloud stopped working properly on multiple screens

I have been using Screencloud for years as the main screenshot and snapping tool on Ubuntu. It has worked fine until I have update to Ubuntu 17.10. Now, it started "switch desktops" when I try to ...
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3answers
3k views

Why the @ in Btrfs subvolume names?

Fairly short question. Is there any technical reason for having an @ in the name of a subvolume of a Btrfs? What's its function, benefit or cause of problems? What is the best practice? Examples: ...
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1answer
114 views

Super slow mksquashfs involving Wine?

My Ubuntu install is on SSD drive ext4 format with LVM. I'm making a 'backup' by: Creating a snapshot, then using mksquashfs to copy the snapshot to an external drive. The problem is after a short ...
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0answers
445 views

Btrfs automatically bitrot correction with snapshots?

I want to set up a notebook (debian) with 1 SSD and 1 HDD each with Luks and Btrfs on it. Because the SSD and the HDD doesn't have the same speed, i don't want to use Btrfs' Raid-1 on it, but i also ...
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1answer
64 views

How to set Unity directly delete files on sda without possibility of recycling [duplicate]

I need to delete two Oracle VirtualBox snapshots from /dev/sda because it is running out of space. Unfortunately there is even not enough space to remove them by VirtualBox Manager. It seems to me it ...
3
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1answer
790 views

What User Space tools support Btrfs functionality (e.g. clone instead of copy)

I've recently been starting to work with Btrfs on Ubuntu, and have it setup as my root filesystem, as well as home filesystem. I have it configured the way apt-btrfs-tools expects, and that is working ...
2
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0answers
820 views

Snapshot for Ubuntu 16.04 LTS

I would like to receive recommendations on the most ideal package that can create "restore points" snapshots for Ubuntu 16.04 LTS Server. Was trying systembackbut it is not being maintained any more. ...
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0answers
65 views

Space Efficient Media Backup

I have 6.8TB of Media I would like to backup. I have an extra external hard drive 7.3TB. Is there a way to make a space efficient incremental backup? I will be adding media and would like to be able ...
0
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0answers
96 views

snapshot system for physical machine with device-mapper overlay

I'm trying to create a snapshot system on my physical development machine comparable to virtual machine snapshots. I do lots of experimental stuff that I might have to revert afterwards, but I cannot ...
3
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2answers
5k views

How to let non root user take ZFS snapshot?

I am trying to let a non root user create zfs snapshots. I've created a permission set and given the appropriate user the privileges defined in it: root@computer:~# zfs allow homepool/myuser ---- ...
3
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1answer
666 views

Snap2html for Ubuntu?

There is a wonderful program created by rlvision.com called snap2html. It creates a very intuitive and visual snapshot of all the files and directories in a certain directory. I'm desperately looking ...
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1answer
2k views

How do I find out how full an lvm snapshot really is?

Background info: I have an unstable system and for a long time have not been able to pinpoint the problem. I have now done a clean install and am adding packages one by one leaving ample time in ...
9
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3answers
5k views

Shutter snapshot tool to copy image to clipboard

I'm a new Ubuntu Desktop user and looking for snapshot tool to use as alternative to Greenshot in Windows. I found Shutter is the one. Though I want to copy the image in Shutter built-in editor to ...
6
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2answers
27k views

Making a snapshot of ubuntu?

I installed ubuntu without LVM. Is it still possible to make a snapshot of it? If so how can I do it? Keep in mind I never made a linux snapshot before. Ubuntu 16.04 LTS, Kernel 4.5
2
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1answer
1k views

Is there a way to restore a Linux system to a previous state Using BTRFS? as in Windows restore points

Windows restore points... How to have the same functionality in Ubuntu ? With existing tools like Deja-Dup I have tried to set up snapshots and got trouble following the instructions. Is there a ...
2
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1answer
449 views

How to use snapshots with BTRFS in Ubuntu along with a separate HOME partition

My goal is to make snapshots while upgrading software. I installed Ubuntu primary partitions and Using MBR with Legacy BIOS with a separate HOME partition in another HDD formatted in XFS and root in *"...
5
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2answers
204 views

Can someone determine my previous sudo password was if they have access to my machine and my new one?

I have found a bug and the developers to whom I reported this bug to want me to send them the VM with the bug. They want me to send them the password and the VM in its current state (a snapshot). I ...