and then I tried it on my computer:

bmike1@c521 ~ $ sudo blkid

[sudo] password for bmike1: 

/dev/sda1: UUID="f35e1797-4cdb-4930-a740-b424afbf61c7" TYPE="ext4" 

/dev/sda3: UUID="7ca483d5-70b1-4449-a2dd-99d5ce8601f1" TYPE="ext4" 

/dev/sda5: UUID="b45d28c4-edc6-4f9a-a80b-144e20197cf8" TYPE="swap" 

bmike1@c521 ~ $ sudo mount -Lb45d28c4-edc6-4f9a-a80b-144e20197cf8 /mnt/sda6

mount: no such partition found

bmike1@c521 ~ $ sudo mount -Lb45d28c4-edc6-4f9a-a80b-144e20197cf8 /mnt/sda2

mount: no such partition found

bmike1@c521 ~ $ 

But then, as I was searching man just now, I think I found why it failed:

 

       Mount by label or uuid will work only if your devices  have  the  names

       listed  in  /proc/partitions.   In  particular, it may well fail if the

       kernel was compiled with devfs but devfs is not mounted.

and after looking into /proc/partitions see they aren't there. How could I put the labels into /proc/partitions?

bmike1@c521 ~ $ cat /proc/partitions

major minor  #blocks  name

   8        0  244140625 sda

   8        1   24148992 sda1

   8        2          1 sda2

   8        3  214134784 sda3

   8        5    5855661 sda5

bmike1@c521 ~ $ 

 Could I open a text editor and manually append them after sda? ?

:-)~MIKE~(-:

On Thu, Jan 1, 2015 at 12:02 PM, Michael Havens <bmike1@gmail.com> wrote:

How would you mount a partition by its UUID/label, when it's not listed in /dev by the UUID/label?

# blkid
/dev/loop0: TYPE="squashfs" 
/dev/loop1: UUID="81200825-ccb6-4370-9e04-dbf763b0dbb6" TYPE="ext3" 
/dev/sda1: LABEL="/" UUID="2639-4A0E" TYPE="vfat" 
/dev/sda5: LABEL="Puppy" UUID="0a86140e-c4ec-4842-b2e0-7eb8c76b3a4e" TYPE="ext4" /dev/sda6: UUID="b6455bbc-9451-47f1-b0bb-2f6bdbb7d2fe" TYPE="swap" 
/dev/sda7: LABEL="Kubuntu" UUID="c3401d73-0c85-43ba-abf5-dc18b525f3e7" TYPE="ext4" 
/dev/sda8: LABEL="Files" UUID="dfb4fb3b-b012-4f41-8bad-c563492a9f99" TYPE="ext4" /dev/loop4: TYPE="squashfs" 
# mount -L 2639-4A0E /mnt/sda1
mount: no such partition found
# 

:-)~MIKE~(-: