Re: mounting local hd from live usb, was 'root account inaccessible'
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On Oct 7, 2014, at 1:12 AM, Andrei POPESCU wrote:
> On Lu, 06 oct 14, 10:23:28, John Aten wrote:
>> I booted up the broken system and attempted to get the device name
>> looking at /etc/fstab, mount and fdisk -l. I got a device name
>> (/dev/sda1) and a UUID.
>
> You should use 'fdisk -l' or 'blkid' only after you boot with your
> rescue disk/usb/whatever, because device names may change (as you found
> out).
All the following was done in the live system:
sudo fdisk -l returns only /dev/sda1
blkid returns /dev/sda1 (whose label and UUID confirm that it is the USB drive) and /dev/loop0. I found the mountpoint of /dev/loop0 using mount, but it appears to be completely empty. Well, the usual directories, /bin, /boot, /home and so on, are there, but they are empty.
I ran cat /proc/partitions, and it returned entries for loop0, sda and sda1. I attempted to mount /dev/sda, and got the error that it was already mounted or the mount point was busy. The output of mount only lists sda1 being mounted. But I guess sda is a partition on a device, not an actual device.
I ran lsblk , and it returned the same devices, sda, sda1 and loop0.
I was confused by the message that all the devices I could find are already mounted, so I thought maybe the local hd is already mounted somewhere. I tried a brute force approach, looking in all the directories listed in the output of mount, and couldn't find the files on the hd. I then realized it would be faster to run:
find -name name_of_my_local_regular_user_home_directory
This returned nothing, so that confirms the local hd is not mounted. But I already suspected this.
The UUID shouldn't change, should it? Isn't there some way I can mount the device by UUID using the mount command? All the web pages I could find are about setting up /etc/fstab to automatically mount by UUID. I don't believe any changes to /etc/fstab will persist after reboot on the live usb. My reading of the mount man page led me to believe that sudo mount -U uuidnumber mountpoint should work, but it returns 'no such partition found'
Thanks,
J
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