USB memory stick for Ubuntu install

[Ralf Mardorf]

On Fri, 6 Aug 2021 08:44:36 +0200, Ralf Mardorf wrote:
>On Thu, 5 Aug 2021 22:21:02 -0700, Bob wrote:
>>I dont see a way to do it on a DVD.  So a USB
>>memory stick should allow me to do that.
>It should be possible to add kernel parameters to the
>ISO's bootloader, probably as described by
>https://help.ubuntu.com/community/BootOptions#Changing_the_CD.27s_Default_Boot_Options
>. Actually I don't know anything about grub parameters such as BADRAM,
>you might need to use a kernel parameter, maybe memmap, see
>https://unix.stackexchange.com/questions/75059/how-to-blacklist-a-correct-bad-ram-sector-according-to-memtest86-error-indicati

I did miss to _clearly_ point out the main reasoning.

It is:

Related to your needs, there is most likely nothing better when using
an USB stick, instead of a DVD. If you boot from a DVD, you can add the
required kernel parameter, too. Using the live ISO by an USB stick,
even while using the persistent feature, you unlikely can make the boot
time kernel parameter persistent.

Keep in mind, the Ubuntu flavour's ISO bootloader is offered, no
persistent feature is present yet. You start booting using the ISO's
default boot parameters and original kernel. Before the startup, it's
already tricky, even when using the persistent feature, you cannot
allow to start the boot procedure/startup automatically. You need to
chose to start the live Ubuntu flavour manually before the automatic
startup starts, otherwise at least persistent user parameters get
overwritten. Really "overwritten" not just "overridden".

While an USB stick other than a burned DVD allows write access...
(unfortunately DVDRAM was a PITA when using Linux, at the time DVDRAM
could have been useful, dunno if it changed in the meantime)
...an Ubuntu live media ISO, even while using persistent features, is
not the same as an Ubuntu install.

You start with booting from the default ISO, the persistent feature
comes into play after starting the startup, if at all! By default even
the persistent feature isn't available, hence I mentioned ventoy as a
tool to use this feature.