Is It Possible To Downgrade To The Last Previous Distribution Version of Linux Ubuntu Or Not? If Yes, Please Explain The Process? If Not, Please Why It Is Not Possible?

Hello. I have a question to ask you regarding Linux Ubuntu.

If you do a distribution upgrade to a higher distribution version of Linux Ubuntu (say version 11.10; same bit version upgrade too) from the LAST distribution of Ubuntu (in this case version 11.04), and later on (Say a few days later, I will be specific.); can I downgrade back the same distribution version of Ubuntu (yes, version 11.04) or not?

I speaking in both general/theoretical and specific term cases.

Please explain is it possible or not? If it is, please explain the process. If it is not, please explain why it is not possible.

Please reply.

Thank you!
BazingerooAsked:
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Darr247Commented:
During bootup, hold down a Shift key during the POST screen and the grand unified boot loader (GRUB) menu should display as soon as Linux is supposed to start to boot.

Typically, the last 3 kernels installed will be available on that menu (along with their associated 'recovery' modes which should leave you at a command prompt instead of in the GUI), with the latest kernel set as the default.

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BazingerooAuthor Commented:
@ Darr247:

Hello. Nice to see you again.

Thank you for your comment.

May I ask one further question that needs some instruction...

...you state, "which should leave you at a command prompt instead of in the GUI". It sounds like GRUB is sending the user to a text based input method typically associated with the usage of Terminal where the user enters and executes line commands. Am I correct? May I ask what are some of the specific line command processes that a user would need to know (enter and execute) in order to execute a specific distribution of Linux Ubuntu; whether you know personally or some well written websites that address this?

Please explain.

Please reply.

Thank you!
BazingerooAuthor Commented:
@ Darr247 & anyone:

Hello.

Could someone please reply to my last comment? This is much appreciated.

Please reply.

Thank you!
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BazingerooAuthor Commented:
@ Darr247 & anyone:

Hello.

One last try. Could someone please reply to my last comment? This is much appreciated.

Please reply.

Thank you!
Darr247Commented:
> It sounds like GRUB is sending the user to a text based input method
typically associated with the usage of Terminal where the user enters
and executes line commands. Am I correct?
That's what 'recovery mode' is, yes.


> May I ask what are some of the specific line command processes that
a user would need to know (enter and execute) in order to execute a
specific distribution of Linux Ubuntu; whether you know personally
or some well written websites that address this?

Press 'e' at the GRUB menu to 'e'dit the startup line, which will reveal quite a few options already set, typically.

Here are an assortment of commands https://help.ubuntu.com/community/Grub2#GRUB_2_Prompt_Usage
And further down there are GRUB 'rescue' mode commands.

Kernel options https://help.ubuntu.com/community/BootOptions#Common_Kernel_Options to use when editing the command line in GRUB.

Sorry - wasn't ignoring you... didn't see either notice for your previous posts.
BazingerooAuthor Commented:
@ Darr247:

Hello again.

Thank you for your all your comments!

Now, I have a very good and complete answer and solution for this question/thread.

Question/thread now closed -- majority of points to your first comment ("Accepted Solution") and some points to complete the question/thread to your last comment ("Assisted Solution").

Yes, I knew you were not ignoring me! I know your dedication to this forum. ;-)

Again, thank you!
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