On Sun, Sep 21, 2025 at 08:40:56PM +0100, Henrik Morsing via GLLUG wrote:

Assuming ext4, I guess you looked at the output of:
         sudo tune2fs -l /dev/<DEVICE>

Yup,

It was blank but when I check it now, it is there:

# tune2fs -l /dev/sda6 | grep UU
Filesystem UUID:          23ba8ae2-5f38-43e7-959a-8495f6889302

I must have eventually done something that set it?! blkid is still not showing 
it though. I've added it to fstab, hoping it will now work.


Scrap that, I remembered wrong. tune2fshas always shown the UUID, however, it 
doesn't work using it in fstab. During boot it times out and says it can't find 
it.



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