Where does blkid "get" UUIDs from for partitions? And what the fuck is a PARTUUID and can I use it fstab too?
$ sudo blkid
/dev/nvme0n1p1: UUID="some uuid" BLOCK_SIZE="4096" TYPE="ext4" PARTUUID="some other uuid"
...
/dev/sda4: UUID="some uuid" TYPE="ext4" PARTUUID="some other uuid"
...
Resizing a partition does not change the UUID somehow, so it's not just a checksum of the partition. But I don't specify that in gparted anywhere.