Questions tagged [uuid]

A universally unique identifier (UUID)

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How to get drive IDs like c0t1d0?

In the documentation to ZFS there are always drive IDs like c0t1d0 mentioned. I only know about UUIDs which are much longer and /dev/sd? How to get the IDs used?
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Ubuntu 18.04 dual boot issues

I recently acquired a new PC. My old PC ran exclusively Ubuntu, but with this new one I'm looking to dual boot with Win10 (I haven't had a win PC in over 15 years lol). I am running Xubuntu 18.04. The ...
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Problem with grub update

I really start hating grub, because obviously updating grub is kind of a gamble. I did a normal update of grub from Ubuntu, and there was no error message or question or whatever, but after ...
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Ubuntu doesn't work :UUID=xxxx does not exist

My computer has two operating systems, Windows 10 and Ubuntu 18.04. Today, when I tried to get into Ubuntu (I already laid it aside for about one week), the whole screen showed pure purple for at ...
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Is it better to use UUID or PARTUUID to automount HDD with fstab?

I'm trying to setup my external harddrive to mount automatically on startup, following Akshit's terminal guide. I initially used the PARTUUID in `/etc/fastab' instead of the UUID: UUID=191486e0-6049-...
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Boot failure after apt update and upgrade: “Gave up waiting for root file system device” in initramfs

Ubuntu Server 18.04, this came completely out of nowhere after running sudo apt update sudo apt upgrade reboot Entering exit unfortunately doesn't work. I tried editing the grub entry and replaced ...
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Help! Startup configuration error. initramfs-tools RESUME=UUUID=(uid swap)

I updated my system (I use Ubuntu 20.04) through the command line; as always and it gave me the error message: $ sudo apt-get upgrade Leyendo lista de paquetes... Hecho Creando árbol de ...
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1answer
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Stuck in emergency mod, I tried something to get out, it get worse

edit : Sorry if I wasn't clear, I will try my best to be understable I'm STUCK in emergency mod and I did something stupid to solve my issue I edit the wrong UUID via edit/etc/fstab : I erased the ...
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Error 13: Invalid or unsupported executable format

I installed Ubuntu alongside Windows 10. The Ubuntu setup instructed me to restart the system. After I restarted it automatically boots into Windows. I used easyBCD to add the entry of Ubuntu in boot-...
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Ubuntu 18.04 crash

I have problem with Ubuntu 18.04 which is currently I am stuck at this screen. Does that mean I should reinstall Ubuntu or there is something I can do to fix the problem? If not how can I get out of ...
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External USB drive keeps unmounting and remounting using different UUID

I got a 10TB external drive that I use for backups. I normally mount it using fstab and identifying it by its UUID. However, recently it started unmounting spontaneously - and then remounting using ...
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How do I get a device's UUID?

When returning from sleep mode the LCD of my laptop shows only snowflakes (like analog tv with no signal). Unless I restart it nothing changes, no display output. I found this question where the ...
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1answer
596 views

Kernel downgrade, UUID not found initramfs

I have a freshly installed 18.04 box. Updates were installed and rebooted. It's running kernel 4.15.0-74 without an issue: root@restore:~# uname -a Linux restore 4.15.0-74-generic #84-Ubuntu SMP Thu ...
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277 views

Ubuntu 16.04.6 & 19.10, Debian 10: timed out boot; Multi-OSes share swap

I'm experiencing boot errors after a recent install of Multiple OSes. I noticed the long boot times watching the boot loading code go by and getting apparently stuck on a start job that takes 90 ...
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2answers
936 views

Does rsync requires changing UUID after copying a partition?

I read somewhere that after using rsync to copy a partition from one device to other one, it is important to edit the UUID, since devices cannot coexist with the same UUID. Is it true? How do I do it?...
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SSSD with “ldap_id_mapping = false” will fail to start, clearing /var/lib/sss/db/* and restarting service does not resolve

I’m working through a strange issue with SSSD on Ubuntu 18.04 - Unit is bound to the domain using Realmd, with SSSD as the primary authentication management service. If I change the line: ...
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1answer
1k views

Unmount by UUID?

I'm building a script and am able to mount by uuid using mount -U UUID, but I can't seem o unmount by uuid. Is this type of operation possible? How would I do it? umount doesn't seem to have this ...
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Unable to mount External HDD missing NTFS and UUID

I need some help! The facts: I was trying to mount a microSD card while my external HDD (Samsung M3 Portable) was plugged and sth went wrong after these mistakes at command line: sudo wipefs --all -...
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NFS - file system UUID and label changed during crash

I was streaming a movie over NFS and it cut out about 1 hr in. The drive was in a 4 x 4 tb box. The drive with the movie (drive 2) on it now won't mount at boot. I took a look at the label and the ...
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Does the uuid from lsblk -f need to match uuid in /etc/fstab

Ouput from lsbk -f NAME FSTYPE LABEL UUID MOUNTPOINT loop0 squashfs /snap/...
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Blank screen after Sleep/Hibernate on ubuntu 18.04

I have the problem that if I sleep or hibernate on my pavillon G7 AMD A6-4400m apu with radeon hd graphics × 2 , the screen will never turn on again, backlight is on but lcd stays black. I tried to ...
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How to change UUID in the /boot/grub/grub.cfg

I am asking how to change uuid in /boot/grub/grub.cfg, so that grub can load OS on a specified partition. I have two disks: SSD /dev/sda1 with uuid d7f0cf11-3edf-4859-b65a-3b5bc60ea7b9 HDD /dev/...
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Why is setting the UUID on a checksummed filesystem so slow, and should I be worried?

I cloned a drive, and now I am trying to change the UUID of the cloned drive. There are various answers on AskUbuntu as to how to do this. I was prompted to run a fresh e2fsck first, which I did. ...
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891 views

Changing UUID for an LVM2_member

I have cloned my SSD and rebooted with a Live distro to change the corresponding UUID. Unfortunately when I run tune2fs -U {some_UUID} /dev/sda5 I get the error tune2fs: Bad magic number .... /...
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How to change mounted HDD UUID to human-readable?

I have Ubuntu 18.04.2 LTS installed on SSD, and I mounted HDD also for data. But when I did this, the UUID it has consists of random set of numbers and letter like this /mnt/9d79a504-bf86-4a1f-99e4-...
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swap uuid on boot

I am a beginner (please be patient :)) and have a question regarding swap uuid. A couple a days ago I have played with swap space and ever since the boot process slowed down. What I did: swapoff, ...
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1answer
535 views

update-grub assigns old UUID

I moved my Ubuntu partition following these steps and mostly everything went OK. I had to use some tools to fix some stuff but anyway, Ubuntu and Windows 10 boots fine. The problem is that whenever I ...
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3answers
6k views

Ubuntu 18.04 not booting, UUID error

Suddenly my laptop stop booting. I have installed Ubuntu 18.04 and now when it's booting I'm getting this error. I searched it and tried all solutions I found but still not booting. Please don't mark ...
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545 views

How to get UUID partition form a given file path in Python

How to get the UUID partition of a given file path in Python, in Ubuntu/Linux
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Ubuntu booting stops after grub with initramfs error

My Ubuntu system is not booting and stops at initramfs error as shown in the snapshot below. I have tried to enter exit as suggested by @ramsudharsan in Boot drops to a (initramfs) prompts/busybox, ...
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Swap: From partition to file, now get “no matching swap device is available”

Running Ubuntu 18.04, I changed from a swap partition to a swap file. swapon -s (summary) and free show the swapfile with the new size. /etc/fstab was changed, permission on the swapfile changed and ...
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1answer
243 views

Is a hdd's uuid constant? [duplicate]

I know you can change the uuid if you choose, but if left alone does it remain the same. Specifically I'm upgrading my motherboard but am unsure if I'll need to alter my fstab with new uuids or if ...
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1answer
1k views

“Invalid path for Logical Volume” in boot.log

I am getting the following messages in my /var/log/boot.log: lvmetad is not active yet, using direct activation during sysinit "disk/by-uuid/db9c53d1-9f64-4bb7-970c-9fce38b499d4": Invalid path ...
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2answers
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/dev/disk-by-uuid/* permissions = lrwxrwxrwx… Is this a security risk?

ls -l /dev/disk/by-uuid Output: lrwxrwxrwx 1 root root 10 sep 15 11:34 49e9738d-627e-... -> ../../sdb5 lrwxrwxrwx 1 root root 10 sep 15 11:34 7ad390da-d1a2-... -> ../../sda6 lrwxrwxrwx 1 root ...
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Get UUID of / filesystem from script

How can I get UUID of a volume that contains the / filesystem? The best thing for that I've found to date is blkid -o list. But this output is human readable and hard to parse. Maybe there is a ...
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A start job is running for dev-disk-by x2duuid-ad0b043b\x2d404c… .device (7s / 1min 30s)

I have this error... Slow boot, I've read other questions about that,but I don't know how to Edit fstab Note that I'm dual booting 2 Linux OS I tried this commend to Open up the fstab: gksudo gedit ...
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luksOpen command context

When using luksOpen, does one specify the UUID and the PARTUUID. Which goes first? On trying to post the above sentence, AskUbuntu robocop said it does not meet "our quality standards". I cannot be ...
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2k views

Emergency Mode, Can't Log In

I am using Ubuntu 16.04 on VirtualBox, and I have been trying to move my home directory to a different partition today. Now, I can no longer log in. As it starts booting up, it goes through the ...
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how to fix fstab of one Ubuntu from older Ubuntu in multi-boot system

I have an old desktop PC (64bit) and an old laptop (32bit), on each I have 2 Windows and at least 2 Linux distros . At the moment I have Ubuntu 14.04.5 LTS Ubuntu 16.04.2 LTS installed. After ...
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Freezing on startup (systemd problem?)

I have a laptop Dell Precision 3510 and my Kubuntu 17.04 very often gets frozen on startup. What I have seen from the output of the command journalctl -xb is, it gets frozen due to timing out on ...
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2answers
5k views

Is it a problem to temporarily have the same UUID for two partitions?

While following the instructions in Move your Linux installation to a new Solid State Drive - even a smaller one, I got stuck right after point "9." where I have copied the UUID of sdb6 (filesystem of ...
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957 views

Problems with libblkid

This message showed a lot of times: udevadm: /usr/local/lib/libuuid.so.1: no version information available (required by /lib/x86_64-linux-gnu/libblkid.so.1) or this: blkid: /usr/local/lib/libuuid....
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1answer
476 views

Cloning Ubuntu with gparted. Both partitions are root?

I wanted to make a backup of Ubuntu. I only have ubuntu on the machine. I got a live usb and booted. Then I used gparted to just copy my Ubuntu to another ext4 partition that I have. That's it. Now ...
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1answer
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uuid missing when running ./configure for cryptsetup-1.7.3 install

So, one week into my first ever Linux computer and out of all the rookie issues I'm having, this one is the most pressing. While running the ./configure command for the cryptsetup-1.7.3 file I've ...
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3answers
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Dell XPS 13 9360 Dualboot Windows 10 and Ubuntu 16.04

EDIT: don't do what I did in this question, check out the answer section below! Screen shows up with this after running Ubuntu from grub64efi: gave up waiting for root device. Common problems: ...
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update-grub error : resume=UUID=xxx not found

I'm currently trying to get hibernation working and I therefore change the GRUB_CMDLINE_LINUX_DEFAULT to "resume=UUID=xxx" where xxx is my swap partition UUID. But it shows me the error error : ...
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2answers
6k views

ubuntu 16.04 slow boot cgroup: new mount options do not match the existing superblock,

I followed steps from here Lubuntu 16.04 boot slow (cgroup: new mount options do not match the existing superblock, will be ignored) @atomSmasher answer. But I dont know how to apply the fix. When I ...
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1answer
125 views

Bootup doesn't follow /etc/fstab

Good morning, I have a media server that has a total of 22 drives. OS, OS Backup and then the media drives. This is Ubuntu 15.10. I have utilized the UUID for setting up the /etc/fstab file. When ...
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What needs to be taken care of after changing the UUID of the EFI system partition?

I need to change the UUID of my EFI partition (background: see below). After changing the UUID -- what do I need to take care of (in order not to mess up the system)? Background: After installing an ...
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ALERT ! UUID- does not exist. Dropping to a shell [duplicate]

I have got problem in Ubuntu 16.04. My system has 2 drives with RAID 1. I tried all that I found but didn't work. I matched the /etc/fstab and /boot/grub/menu.lst file with both /dev/md126 also ...