Questions tagged [uuid]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
40
votes
2answers
86k views

How to run custom scripts upon USB device plug-in?

What is the state-of-the-art method for automatically executing custom scripts upon USB device plug-in under current Linux distributions like Debian/CentOS/Fedora? For example if you want to ...
26
votes
3answers
28k views

Difference between UUID from blkid and mdadm?

Can someone explain the difference between the UUID's reported by blkid and mdadm? On one of our CentOS systems, for example: [root@server ~]# blkid | grep /dev/md1 /dev/md1: UUID="32cb0a6e-8148-44e9-...
27
votes
3answers
34k views

Why can't I specify my root fs with a UUID?

My system boots OK with this in my GRUB 2 config: linux /bzImage root=/dev/sda2 init=/usr/lib/systemd/systemd ro But if I replace /dev/sda2 with the corresponding UUID: linux /bzImage root=UUID=...
4
votes
2answers
6k views

Is machine-id a uuid?

I searched my question and none of them answered me: Is machine-id as unique as mainboard UUID (fetched by "get csproduct UUID" command on windows)? And is enough reliable to bind a license on machine-...
19
votes
6answers
49k views

generate consistent machine unique ID

Can we generate a unique id for each PC, something like uuuidgen, but it will never change unless there are hardware changes? I was thinking about merging CPUID and MACADDR and hash them to generate ...
24
votes
8answers
31k views

How to change filesystem UUID (2 same UUID)?

I have a fedora guest OS in VMware. I want to expand /boot partition, so I add another virtual disk to this VM, and try to clone the disk. After dd if=/dev/sda1 of=/dev/sdb1, blkid report that /dev/...
5
votes
1answer
886 views

Changing HFSPlus UUID from PartedMagic

I needed to make a clone of my hard drive recently (bad blocks FTW). I was using Clonezilla at the time. However, Clonezilla refused to copy the HFS+ partition, so I did it manually. The problem is ...
1
vote
1answer
94 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 ...
13
votes
2answers
6k views

Modifying a BTRFS filesystem UUID

I've made backups of my BTRFS filesystem using Clonezilla, and have restored one of those backups to a file named 2013-11-29.sda3.img. I need to get some files out of this backup, but there's a hitch....
11
votes
2answers
30k views

What is the purpose of UUIDs for NICs?

On Fedora/RHEL/CentOS there is a line in /etc/sysconfig/network-scripts/ifcfg-x files which defines UUID: UUID=30fcd648-ad1e-4428-as6f-951e8e4d16df NICs have MAC addresses by them selves, so what is ...
12
votes
1answer
7k views

reference whole disk (/dev/sda) using UUID

On my system (Debian), I can see the UUID identifier for all of my disks partitions (i.e. /dev/sda1, dev/sda2, ..) ls /dev/disk/by-uuid/ However, I don't see the UUID identifier for /dev/sda itself. ...
1
vote
2answers
4k views

Extract UUID value from JSON returned from HTTP reply

I am trying to make a little script in shellscript that takes one serviceUuid from a response and use it. I just print the server response on a file called final.txt Now i need to extract the value ...
3
votes
3answers
122 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 ...
1
vote
0answers
41 views

mdadm Raid 1 OS array dissappeared, UUID's all zeros

A little backstory because I'm not sure what's relevant... I set up a file server at a school here in West Africa where they teach computer classes, ESL, and a few other things. Though it's used ...