Questions tagged [uuid]

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Black arch Boot problem, UUID not found

I’ve installed black arch “from live iso” and it was installed successfully But after reboot it stuck in black screen starting version 245.5-2-arch ERROR: device ‘uuid=xxxxxxxxxx‘ not found skipping ...
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1answer
48 views

Changing the windows UUID volume with Debian

I'd like to be able to put an ID on a USB key formatted in NTFS under debian and be able to read it with Windows 7 and 10. As the identifier must be unique, I prefer to use UUID rather than label. I ...
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1answer
18 views

RPI root partition lost PARTUUID and can't boot

So I cloned a RPI sd card so I could run the same system at home and at work. The sd cards were slightly different sizes so after I ran dd I had to run resize2fs and fsck. If I boot the Pi with this I ...
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3answers
60 views

What triggers disk's UUID to change?

On the same model of industrial PCs, I see UUID of the main SSD changed. Those 2 IPCs are restored from 2 similar but different Linux disk images. Question is as per the title. UUID of the main disk /...
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When cloning from an OEL7 template VM in VMware, how do you change any unique identifying info that may be redundant on all clones?

I know there is UUID and other info that is used for disk partitions and network. I am most concerned that I would have issues somewhere by all machines in an environment that were built using the ...
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2answers
40 views

ZFS Recovery Mirror-0 UNAVAIL missing device

I'm new to ZFS and I screwed things up big time. I had multiple ZFS pools because I didn't realize you could have separate mirrors under the same pool. I am still rebuilding array, so one of my ...
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2answers
57 views

Efficient way to obtain a device mountpoint from its UUID

In a script I'm working on, a variable UUID must be used in obtaining the current mountpoint a device is attached to. The solution I came up with is this one: UUID='fc70ae3d-65e7-4437-a371-...
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2answers
55 views

How to process wipefs command output?

My command, wipefs /dev/sdX, gives the below output: offset type ---------------------------------------------------------------- 0x111 ext4 [filesystem] ...
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2answers
214 views

How do I install grub on a disk drive using a UUID?

On my Arch Linux I am trying to install GRUB as follows: grub-install /dev/sda Instead of /dev/sda to do with UUID. However two points to bring up: I cannot find a UUID for /dev/sda only for /dev/...
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1answer
106 views

wrong partition UUID in fstab and partition showing as W95

I have Win10 / Ubuntu 18.04 dual boot, and something messed up my partitions. I did try to resize the Win10 partition in order to enlarge my Ubuntu partition, but that didn't work so I resized back ...
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2answers
118 views

How to correctly get the UUID of the entire disk?

As UUID's are assigned in partitioning phase (by software), there is no UUID available for entire disk. However, /dev/disk/by-id/ contains promising information for the same purpose. We can get the "...
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1answer
2k views

Debian Buster - UUID Does not exist. Dropping to shell problem

I have no idea what I did but when I startup I get this message in BusyBox: Give up waiting for root file system device. Common problems: -Boot args (cat /proc/cmdlines) -Check rootdelay= (did the ...
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1answer
73 views

Changing the UUID of NTFS VeraCrypt-encrypted volumes under Linux?

(Partially related to this but the case is significantly different) Recently I have cloned a drive and I need to use both in my system without formatting either one of them, so I need to change one ...
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1answer
82 views

Mount points in /etc/fstab on Debian system for an encrypted partition

I recently installed Debian 10 on my laptop and for the first time I decided to give file encryption a go. But I've found something interesting in the /etc/fstab file, and it's that it doesn't use ...
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2answers
50 views

Why does lvm2 use mixed case UUIDs?

I noticed that lvm2 objects use mixed case UUIDs: ~ # lvdisplay ...
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0answers
19 views

Registration of new nodes in a network

We install Debian (server variant) on a new client node (possibly behind a masquerader) in our network. Now we need to assign an autogenerated UID and secret keys(s) (for SSH and for API such as ...
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5answers
2k views

Why is drive/partition number still used?

Many times, especially when messing around with boot-loaders, I'll see numerical drive and partition numbers used. For instance, in my /boot/grub/grub.cfg I see set root='hd0,gpt2', my UEFI boot ...
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2answers
286 views

“sort -nu” on uuids

anyone could explain why "sort -nu" returns only 1 unique line in example below? $ cat /tmp/test_ 1e971713-31e4-62d0-a3d1-37c0610c10e5 1e97d59f-bc32-6126-b7b1-0b52ddd35273 1e971713-31e4-62d0-a3d1-...
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1answer
311 views

/etc/fstab - using bash command output to get UUID?

I placed an entry in my fstab file to add a swap partition. I used output of a bash command to get the UUID of vdb1 partition(I can't copy paste). Like this: UUID=$(blkid -o value -s UUID /dev/vdb1)...
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Dropped into Arch emergency shell, incorrect FSTAB causes mounting issues, keyboard does not work, installing Arch onto a USB key using QEMU

This is my first time trying to install Arch so my apologies if I don't understand your answer. Here is my problem. I am using the QEMU emulator (x86_64) to install Archlinux on a 128GB Samsung USB ...
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1answer
396 views

why do some directories have .uuid directory in a directory?

I have seen this quite a few times. In some random directories there is usually a .uuid file or directory therein. The directories are nothing special so as to speak. They are mostly random media ...
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1answer
1k views

Change PTTYPE and UUID of an fdisk created partition

I've got two systems. On one, I decided to try and increase the virtual disk /dev/sda. So I delete the partition using fdisk and recreate it with a larger end size but identical start location. ( ...
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1answer
869 views

Short and long uuids under /dev/disk/by-uuid

There are several hard disk partitions on my system (Linux josDeb 4.9.0-8-amd64 #1 SMP Debian 4.9.144-3.1 (2019-02-19) x86_64 GNU/Linux). It is working with: bejo@josDeb:~$ ls -l /dev/disk/by-uuid ...
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3answers
233 views

Why use udev rules for naming, if we could just use /dev/disk/by-uuid?

I don't understand the inclination towards using udev rules for raw devices. Example for Oracle ASM devices, it recommends using udev rules for naming raw devices, as the device order can be ...
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2answers
217 views

How to tell without knowing the mount point that a device UUID is mounted?

System: Linux Mint 19.1 Cinnamon 64-bit, based on Ubuntu 18.04 LTS. I would like to know if it is possible to get the following information: Is this UUID (of a block device) mounted or not? (without ...
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3answers
550 views

reliable scripting way of obtaining UUID of boot partition

I want to script a somewhat automated method for editing /etc/default/grub and appending fips=1 boot=UUID=???? to GRUB_CMDLINE_LINUX= coincidentally /etc/fstab contains UUID=12345blabla /boot xfs ...
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2answers
42 views

Partition recovered

Partitions MBR has been destroyed accidentally by a friend, Then most partitions are unviewable which is too bad, can all the partitions be recovered? I have a text file including the original ...
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2answers
6k views

Create unique random numbers (UUIDs) in bash

I want to create random unique numbers (UUIDs) as the following node.id=ffffffff-ffff-ffff-ffff-ffffffffffff First I tried this $ rndnum=` echo $RANDOM"-"echo $RANDOM"-"echo $RANDOM"-"echo $RANDOM"-...
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1answer
283 views

System goes into initramfs mode

I am trying to boot my system but it goes to initramfs and nothing happens. On using exit command it shows: ALERT! UUID=3668c6fc-7986-490b-8642-705c4532d16a does not exist. Dropping to a shell! On ...
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0answers
180 views

How to make exfat appear as a disk on Computer (RedHat 6)

I have a redhat 6 on 1TB HDD and another 1TB HDD with exfat format, anyway on Computer I can find the drive where redhat installed but not the exfat drive. I do add a line to /etc/fstab for auto ...
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3answers
946 views

Drive won't boot from its Grub, but will from another drive's Grub, after cloning, why?

It was a month ago, so if you ask me on details, I might still remember, but better act on information that can be given as of now. Due to the lack of time, I did not ask for help here. I have cloned ...
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1answer
1k views

What are the use cases for a hard disk's WWN?

I noticed today while setting up a new system that the disk as represented by /dev/disk/by-id also had a WWN link that I was not familiar with: My research suggests that this is a "World Wide Number" ...
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2answers
5k views

How do I create a zpool using uuid or truly unique identifier?

I created my first zpool the other day, assigning by drive letter, and found that when I rebooted it was degraded. Upon closer inspection, I realized that my drive letters had changed with reboot, so ...
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1answer
992 views

Add PARTUUID to DOS MBR

I have an MBR style formatted SD card where I need a PARTUUID in order to mount a partition there as the rootfs (via linux kernel parameter root=PARTUUID=...). Using an fs UUID does not work. ...
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1answer
96 views

UUID of fs - where are they stored?

Recently I tried to install Ubuntu Studio 18 and upon restart was given GRUB prompt, not Linux graphic login. Surprised, I started to investigate and found that grub.cfg file in ESP partition contains ...
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2answers
3k views

How to change UUID after cloning a Mac HDD with `dd`?

After 1 day of googling and try&error I give up and ask for help. Long story short: I cloned internal HDD of my iMac (Mid 2011) to external SDD with dd command. Now I have two identical discs ...
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1answer
110 views

what is the advantage to configure the network ETH with UUID?

what is the advantage to configure the network with UUID? uuidgen eno093736 1b64d026-c6a6-447c-85aa-40c5d2db2c4e for example we want to configure BOND under /etc/sysconfig/network-script what is ...
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3answers
2k views

Store a custom serial number on a USB flash drive, immune to overwriting

I'm working with massive amounts of USB flash memory. I'd like to be able to track events regarding the USB drives. Specifically: I perform f3 tests, format the drives and write data to them. I'm ...
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0answers
508 views

Can't run 'update-grub'

I've got some trouble with my Ubuntu-System: update-grub Generating grub configuration file ... grub-probe: error: disk `mduuid/c7ac5a8fef833db7b45d6c2ebb2e20e6,1' not found. But I'm still able to ...
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2answers
2k views

how to perform xfs_repair on disk that is actually UUID

we have redhat machines version 6.x we want to fix the file-system on one of our disks UUID=198s5364-a29c-429e-b16d-e772acd /data_SA xfs rw,noatime,inode64,allocsize=16m 1 2 but ...
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1answer
2k views

When trying to mount my UUID can't be found, how can I find

I'm building a lighting node, and run the command [sudo mount -a] I get this error saying my UUID I can't be found. Can someone please help?
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1answer
590 views

UUID's when changing hardware

My question is this... In /etc/sysconfig/network-scripts/ifcfg-eno1 there is a UUID to identify the on-board network interface. I also notice now that some partitions in fstab are also identified by ...
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1answer
2k views

Why use UUIDs in /etc/fstab instead of device names? [duplicate]

What is the reasoning behind using UUIDs in /etc/fstab instead of device names (like /dev/sbd2)? Device names &/or partition numbers seem substantially cleaner from an administrative viewpoint.
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1answer
638 views

debian stretch UUID package

I am running Debian 9.3 (Stretch). I am trying to install some tools from Vmware and it asks for a package UUID 0.03 or newer. How can I upgrade UUID to newer version? It does not proceed any further ...
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1answer
1k views

Slackware64 14.2 - GRUB2 - How set default <UUID> instead <DEVICE>?

i am trying the grub configuration file "/boot/grub/grub.cfg" in the kernel line, set "root=UUID=" instead "root=/dev/" for example when i ran : grub-mkconfig -o /boot/grub/grub.cfg the file /boot/...
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Migrating Linux to new system

I read a couple posts about migrating Linux from one PC to another PC and my understanding is that Linux will just move and work without issue. Based on my changes this should be true. I am waiting ...
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1answer
803 views

is it possible to capture the UUID number before creating file system on disk

is it possible to capture the UUID number before creating file system on disk? if yes how - by which command ? blkid ( before run mkfs.ext4 on sdb disk ) <no output> blkid ( after run mkfs....
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1answer
117 views

how to identify UUID conf or ordinary dev conf from fstab

we need to add disks on more then 100 redhat machines, therefore we need to update also the /etc/fstab on each machine the problem is that some machines configured with UUID and other with ordinary ...
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2answers
1k views

UUID in fstab + in which cases we must not configured UUID in fstab

discussion - we have redhat linux machines and my question is about the UUID configuration in /etc/fstab file , and in which cases UUID risk the OS as I understand we MUST NOT use UUID in /etc/...
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3answers
183 views

in which cases it will be problematic to configure UUID in fstab

We are thinking about to change all Linux fstab configuration to work with UUID instead the current configuration Some of the disks are with non RAID and some of the disks are with RAID10 I searched ...