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Questions tagged [uuid]

A universally unique identifier (UUID)

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How to convert OS partition from XFS to ext4?

Is it safe to use fstransform?
tng's user avatar
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HDD shows up ub lsblk but not blkid

I'm building a Ubuntu 24.04 server and trying to get the UUIDs of attached HDDs. They show up when running lsblk, but not when running sudo blkid (only my OS NVME shows up). The Ubuntu documentation ...
anvoice's user avatar
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How can I verify why I am getting a grub error (couldnt load kernel), if I have already verified the correct UUID?

I am getting the following GRUB (2.06) error when trying to boot: "Error: File "/vmlinuz" not found, Error: You need to load the kernel first" error message written from memory so ...
larakikato's user avatar
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After upgrade to ubuntu 23.10 from 23.04: ALERT! UUID=xxxx does not exist. Dropping to a shell!

Once I upgraded from Ubuntu 23.04 to 23.10 and I Can't boot to it anymore! Gave up waiting for root device. Common problems: - Boot args (cat /proc/cmdline) - Check rootdelay= (did the system wait ...
Omar_Hafez's user avatar
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35k views

uuid=xxxx does not exist

I have installed ubuntu22.04 and window11 double systems on my ROG zephyrus 16. Two systems work quite well previously but today when I switched from window to ubuntu, I found that it gave me an error....
Tree's user avatar
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Tried to fix loops in kernel upgrades that said couldn't find UUID and fix with RESUME but always gave me generic kernel instead of updating it

I had updated my Kubuntu 23.04 to 23.10 and though I was told that in everyday updates, that the system not finding the right UUID is normal (which I never understood because why make new kernels/...
MichaelTheGamer's user avatar
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How do you set up GRUB after duplicating a drive with Clonezilla in the same PC?

My context (to avoid the XY problem) I have a 500GB SSD that may be failing and is now too small. After a thorough backup, I will replace it with a 1 TB drive in the same slot and move the 500GB to ...
Matthew's user avatar
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Accidentally deleted the system `uuidd` user and group -- which package to reinstall?

I accidentally deleted the system user uuidd and their group from my system. I want to reinstall the package they belong to, but when I look for the manual of uuidd on the net, it references the util-...
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How to fix BusyBox Initramfs Error on Ubuntu 22.04 , showing many types of error

I am getting boot failure with this message on ubuntu 22.04: [ 0.131760] x86/cpu: SGX disabled by BIOS. [ 1.974254] nvme nvmeo: failed to set APST feature (2) Gave up waiting for suspend/resume Gave ...
Saurav Singh's user avatar
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Gave up waiting for root file system device in ubuntu 22.04

My laptop has ubuntu 22 and windows OS installed. Ubuntu was logged in. Mistakenly, I forgot to plug the charger and battery drained. When I tried to restart, I can see grub menu, but then it loads ...
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Gave up waiting for root file system device...HELP

This is what it's showing me. I'm not very familiar with Ubuntu, and this is a pain in the ass. I can't do anything only, type commands at the initramfs prompt. I have been trying to figure it out, ...
emranismail's user avatar
1 vote
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When I mount a certain partition under the DISKS app it adds a "1" to the mount point UUID?

I do not understand why when a certain hard drive partition is mounted using the DISKS utility app it adds a "1" to the UUID for the mount point location. When I do this on another partition ...
Ed Delauter's user avatar
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76 views

Booting issue: ×86/cpu: SGX disabled BIOS

When I boot up I get this message and can’t log on. [ 0.185085] ×86/cpu: SGX disabled BIOS. Gave up waiting for root file system device. Common problems: Boot args (cat /proc/cmdline) Check ...
MrMozzarella's user avatar
1 vote
1 answer
2k views

How to increase the entropy to avoid the warning message: Available entropy is low

Linux 5.15.0-72-generic #79~20.04.1-Ubuntu I have the LAMP stack and solr installed on my Linux machine and quite a number of programs exchanging data using SSL sockets with other machines. After ...
IpSmile's user avatar
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2 votes
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127 views

Custom kernel giving an error ALERT! UUID=<my-/dev/sda5-uuid> does not exist. Dropping to shell

I have compiled and installed a custom kernel version in Ubuntu 22.04 by following the instructions in https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel Now when I select my new customized kernel (5....
sammy17's user avatar
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Multiple partitions with same UUID, grub error, cannot boot

I'm quite new to Linux so I thank you in advance for your patience as I'm learning. I'm running Ubuntu 20.04, and I recently got a grub error at startup -- this one: https://www.geeksforgeeks.org/how-...
user1668737's user avatar
1 vote
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How to fix lvm PV name "[unknown]" without forcing the removal of second PV from VG : WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-Ha

After I accidentally created a GPT label on /dev/sdb, I need to fix the PV NAME "[unknown]" (which was /dev/sdb previously) : $ sudo pvs PV VG Fmt Attr PSize PFree /dev/...
SebMa's user avatar
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Ubuntu UUID error dropping to a shell

ALERT! UUID=XXX does not exist. Dropping to a shell. So I got this error. I found several solutions on forums to change from RAID to AHCI. I don't have that option (Acer Laptop). The SSD is ...
Timmmsa's user avatar
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fstab can't find (mount) USB drive - any ideas?

I just cannot get fstab to mount a drive! Have added entry in fstab: UUID=CC89C1B5 /media/USB vfat nosiud,nodev 0 0 When I run sudo mount -a (to mount all in fstab) it gives error: "can't find &...
Timo001's user avatar
  • 11
2 votes
1 answer
2k views

How to change UUID of NTFS partition?

How to change UUID for NTFS partition?
Anton Samokat's user avatar
1 vote
1 answer
4k views

Unable to boot, UUID does not exist

I am a new Linux user; I've consulted other forum posts to the best of my ability but I have not been able to figure this issue out on my own. This is a Dell Inspiron 7856, recently installed Ubuntu ...
velvetant's user avatar
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282 views

Virtual box+Ubuntu:Timed out waiting for device error on boot

I have Ubuntu 21.04 installed on Virtual box running on Windows 10 Home. Everything is fine but after some operations there is an issue when I go to boot. I updated APT package information like enter ...
wei wei's user avatar
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1k views

BLKID doesn't show external hdd UUID

On my raspberry Pi, I am using two external HDDs. OS is Ubuntu Server 20.04.2 LTS. The first one is a small WD elements that automount perfectly well (USB connected) The second one is a big WD drive ...
Edwin's user avatar
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1 vote
1 answer
124 views

Mass production for Ubuntu systems

I'm working on a project that is based upon an industrial PC. It runs Ubuntu 20.04 Desktop. Right now I finished the development and I have a PC with a ready-to-use environment: customized Ubuntu ...
Mark's user avatar
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1 vote
0 answers
2k views

Lost UUID on RAID devices after reboot

I'm looking for a bit of help trying to figure out why I can not reassemble a RAID after reboot. I have tried: sudo mdadm --assemble --scan My previous /etc/mdadm/mdadm.conf is as follows. The RAID ...
Wally's user avatar
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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?
Christian's user avatar
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1 answer
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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 ...
Walter Benzing's user avatar
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336 views

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 ...
OilLight's user avatar
16 votes
2 answers
22k views

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-...
Sebr's user avatar
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0 answers
262 views

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 ...
bio_BATMAN's user avatar
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1 answer
98 views

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 ...
Julien20's user avatar
1 vote
0 answers
688 views

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-...
Hiren Chafekar's user avatar
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0 answers
118 views

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 ...
marwa jomaa's user avatar
1 vote
0 answers
2k views

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 ...
uniomni's user avatar
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0 votes
1 answer
2k views

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 ...
loko's user avatar
  • 13
1 vote
1 answer
1k 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 ...
Johan's user avatar
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0 votes
1 answer
892 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 ...
xtrchessreal's user avatar
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1 vote
2 answers
2k 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?...
BlueSkies's user avatar
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1 vote
0 answers
1k views

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: ...
scotchman's user avatar
3 votes
1 answer
4k 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 ...
Sarah Szabo's user avatar
  • 1,493
0 votes
0 answers
353 views

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 -...
Leroy's user avatar
  • 1
0 votes
0 answers
330 views

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 ...
GnomGnom's user avatar
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0 answers
1k views

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/...
StevenW's user avatar
  • 11
1 vote
1 answer
3k views

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 ...
Thundercoal's user avatar
11 votes
5 answers
44k views

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/...
shijie xu's user avatar
  • 291
3 votes
0 answers
448 views

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. ...
Michael's user avatar
  • 1,145
1 vote
2 answers
3k 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 .... /...
Juan Leni's user avatar
  • 2,198
4 votes
2 answers
2k views

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-...
Ivan Sidaruk's user avatar
0 votes
1 answer
2k views

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, ...
J. Doe's user avatar
  • 1
1 vote
1 answer
1k 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 ...
Deses's user avatar
  • 172