Questions[live-environment](ubuntu)

When I run the live image (Ubuntu 18.04), it shows the root filesystem being an overlay with the squashfs image (/cdrom/casper/filesystem.squashfs, containing the main data) as lower layer, and /cow/upper as upper layer. But /cow is not visible anymore as it is hidden by the overlay mounted on root.

Where (on what device) does the upper layer live? Is it accessible somewhere or is it a memory-only device?

The Live environment sets and writes the time in UTC to the hardware ("BIOS") clock. Which of course borks it for Windows. (see Ubuntu bug 1703479)

Is there a boot option or similar to make it not do that?

Either:

• set it so use localtime in HW clock, or
• set it to never write to the HW clock (after all a live CD should not make changes to the system, at least not automatically)
• maybe some other solution

PS: The mentioned bug was reported for version 17.04, while it happened to me with 18.04 (ubuntu-18.04-desktop-amd64.iso).

I am asking this question because I accidentally run sudo apt-get purge libre* and literally everything started deleting to the point where I had to power off to make it stop.

So how does "try Ubuntu without installing" work? Like what is saved, if anything, and does what you do in there affect anything?

I was not able to determine by searching whether this question has already been asked and answered. My search always turned up some other 32 versus 64 bit question.

I want to know if it is possible to determine whether an inactive Ubuntu install, that is, on a drive you did not boot from, is the 32-bit or 64-bit version. I cannot use uname -m because the Ubuntu I want to know about is not the Ubuntu which is running.

For example, if Ubuntu is installed on the hard drive of a desktop PC and the PC is booted from a Live CD/USB version of Ubuntu is it possible to tell what is installed on the hard drive just by looking at the file system of the Ubuntu on the hard drive?

Error message:

(initramfs) unable to find a live medium containing a live file system

I got this error while trying to install Ubuntu 10.10 from a bootable USB stick on to Asus X64J series laptop. After getting this error the installation fails to start.

I have used the same USB stick on some other laptops and the installation started as usual. Any help will be appreciated.