Author Topic: Ubuntu.. missing after upgrade!!  (Read 2525 times)

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Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #30 on: November 08, 2016, 08:39:36 am »
Mark... I can't do anything! I just get the prompt to login, and what ever I enter comes up Login incorrect_this is the problem I'm having. So to attempt to enter a password only returns login incorrect.

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #31 on: November 08, 2016, 11:58:44 am »
From the GRUB menu boot into "recovery mode", then choose "drop to a root shell"

From the command line run:
Code: [Select]
ls -a /home
and post the results here.

That should give us the username(s) of any accounts on the system.

Once we know the username(s) we can proceed to reset the password.
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.
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Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #32 on: November 08, 2016, 05:06:21 pm »
If I select recovery mode from the advanced menu I can either press enter to boot or 'e' to edit or 'c' for a command line. If I press enter to boot then this is where all goes wrong. A screen of text messages results which terminating with a request to login! Can I do anything from options 'e' or 'c'
Would I be correct in assuming that after pressing enter (recovery mode) a panel of options should appear? if so this is not the case here, just the scrolling check screen.

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #33 on: November 08, 2016, 05:39:16 pm »
Yes when you choose "(recovery mode)"you should eventually end up at a screen like this:


Is that not the case ?

If not, you're going to need a LiveDVD/LiveUSB .. do you know how to create one ?
« Last Edit: November 08, 2016, 05:41:07 pm by Mark Greaves (PCNetSpec) »
WARNING: You are logged into reality as 'root'
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Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #34 on: November 08, 2016, 06:12:25 pm »
That's exactly where I'm at!  I'm not getting the options drop down panel that you've posted. I've already down loaded a copy of Ubuntu 16 on both disk and usb. This is a dual boot Laptop Windows7/Ubuntu how do I boot from disc or usb?

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #35 on: November 08, 2016, 08:37:24 pm »
When you say you've downloaded it to USB/DVD to you mean you've just plonked the ISO file onto them, or you've used an application to "burn" the image to them creating a bootable USB/DVD installation media ?
(how exactly did you burn the ISO image to the USB/DVD ?)

As for how you boot from them, you'll either have to hit a specific key to access the "Boot Device Selection" screen (immediately after turning on your PC), or edit the  BIOS to set either the USB or DVD as the FIRST boot device.

What is the make/model of your PC and I'll try to get more precise info ?
WARNING: You are logged into reality as 'root'
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Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #36 on: November 08, 2016, 09:53:21 pm »
I down loaded Ubuntu and transfered it to disc and used LiLi (Linux Live) USB creator. My Laptop is an ageing ACER ASPIRE 5536 running Windows 7

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #37 on: November 08, 2016, 10:10:04 pm »
If you haven't already done so you'll need to activate the "F12 Boot Menu" key .. instructions to do this can be found on page 32 of this manual
http://global-download.acer.com/GDFiles/Document/Generic%20UG/Generic%20UG_Acer_1.0_A_A.zip?acerid=634508092654384078&Step1=NOTEBOOK&Step2=ASPIRE&Step3=ASPIRE%205536&OS=ALL&LC=en&BC=ACER&SC=EMEA_27

Once you've enabled it, (with the USB stick already insterted) immediately after turning on your PC hit the F12 key and you should be presented with a menu asking you which device you want to boot from .. select the USB stick.

[EDIT]

To save you having to download the manual, here's the relevant part of page 32

Quote
To enable the F12 Boot Menu via the BIOS Setup Utility.

1 Turn on your computer.

2 During startup when the Acer logo shows, press the F2 key to enter BIOS
Setup, where you can set system parameters.

3 Use the left and right arrow keys to select the Main submenu.

4 Use the up and down arrow keys to select F12 Boot Menu.

5 Use the F5 or F6 key to change F12 Boot Menu to Enabled.

6 Press the ESC key to enter the Exit submenu, press the ENTER key to Exit
Saving Changes. Press the ENTER key again to select Yes. The system will
reboot.

7 After rebooting, when the Acer logo shows, press the F12 key to open the
Boot Menu. Here you can select which device to boot from.
« Last Edit: November 08, 2016, 10:14:34 pm by Mark Greaves (PCNetSpec) »
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.
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Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #38 on: November 08, 2016, 10:49:59 pm »
OK Mark.. Will give it a go and come back with the result, thanks again for your time helping me here.

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #39 on: November 08, 2016, 11:47:51 pm »
At this point just confirm you're able to boot to the LiveUSB .. do not attempt to reinstall yet or you might risk killing Windows.
WARNING: You are logged into reality as 'root'
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Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #40 on: November 09, 2016, 07:27:51 pm »
okey dokey all good to go Mark
« Last Edit: November 09, 2016, 08:04:15 pm by Penndrow »

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #41 on: November 10, 2016, 12:38:04 am »
Okey dokey then....

So what exactly is the plan here ?

to recover data from the Ubuntu partitions ?

to delete Ubuntu and reinstall ?

to see if this is a fixable file system error ?

to chroot into the Ubuntu partitions and attempt to reset the password from the LiveUSB ?
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.
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Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #42 on: November 10, 2016, 07:52:23 am »
I'll go for what ever is the easiest option as long as I don't create any problems on Windows. I had nothing on Ubuntu that I needed to keep, so no great loss to re install. Cheers

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #43 on: November 10, 2016, 01:01:14 pm »
Okay, I think the easiest route would simply be to reinstall.

That said in light of your "no risk to Windows" sentiment I must make sure you understand there is NO risk free option here .. in fact to reinstall Ubuntu we absolutely WILL break Windows booting until Ubuntu is reinstalled so if at any point after deleting the Ubuntu partitions you find it impossible to continue and reinstall Ubuntu you'll also not (easily) be able to boot Windows.
The reason for his is because currently the GRUB bootloader config files (which are also chainloading the Windows bootloader) are contained on the Ubuntu partition we're going to need to delete prior to reinstalling. Windows will still be there but it will be unbootable until Ubuntu is reinstalled.

There's also the facts that ANY partition manipulation carries a (very) small risk of corruption, and there's the obvious scope for user mistakes such as deleting the wrong partition.

These risks are minimal, I'm not trying to scare you off but they DO exist, it would be wrong if I didn't make you aware of them ;)

So, a bit of information gathering is in order before we continue.

Can you boot to the Ubuntu LiveUSB .. select "Try Ubuntu" NOT "Install Ubuntu" .. then once at the Ubuntu desktop open a terminal (Ctrl+Alt+T) and post the output from these commands
Code: [Select]
sudo fdisk -l
and
Code: [Select]
sudo blkid
so we can get an idea of the current partition layout.
« Last Edit: November 10, 2016, 01:02:48 pm by Mark Greaves (PCNetSpec) »
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.
pcnetspec.co.uk

Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #44 on: November 10, 2016, 06:18:19 pm »
Had to bootup from disk but no problem... how can I best post the results you need? I have two JPG. screen image files but probably to large to post?

 


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