I have looked at the following pages now:
p1: 'Lukasz Szybalski'
https://lists.debian.org/debian-user/20 ... 00062.html
p2: 'Jeff Ferrari'
http://www.poweredbyjeff.com/2015/10/29 ... an-Jessie/
p3: 'LucaAlloatti'
https://wiki.debian.org/InstallingDebia ... SSD/jessie
They propose solutions that are alike, but with small differences. It seems like one can reach a terminal via booting the debian operative system install USB-stick. There shall be an option for that according to internet page p3 (boot live USB ->Advanced ->Rescue mode..). Corresponds 'advanced' to 'graphical expert install' in the UNetbootin menu (the menu for the install USB)?
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The three internet pages (p1, p2 and p3 linked to above) more or less suggests to write the following commands in the terminal/shell:
cd /target ( should it rather be "cd /dev/nvme0n1" in my case?)
mount --rbind /proc proc/
mount --rbind /sys sys/
mount --rbind /dev dev/
mount --rbind /run run/
chroot . /bin/bash
What are the "mount --rbind" commands above for? Do they simulate/pretend that the archives in the USB-stick directory "/proc" exist in the device directory "/dev/nvme0n1/proc" ? Why are they not copied then? Are they not needed later (when the system in installed)?
Shall I replace target with the path to the device I want to install Debian? In my case the path to the device (SSD M.2 NVMe PCIe) is "/dev/nvme0n1". Should I replace "/target" above with "/dev/nvme0n1" then?
Do you think that these commands are correct for my use?
then they suggest GRUB is installed, but disagree wether it should be performed with 'backport' (which I think are 'test' or 'unstable' version of Debian) or not. Jeff Ferrari (p2) says NVMe support is much better for kernels with version number above 3.19. I have no clue what version of kernel that Debian 8.7.1 has, and I can not find it by searching the internet. Anybody knows what kernel has Debian 8.7.1 has or how to check it up?
For stable version :
apt-get update
apt-get install grub-efi-amd64
update-grub
grub-install (Should it rather be "grub-install --target=x86_64-efi /dev/nvme0n1" ?)
For backport version :
apt-get -t jessie-backports install linux-image-amd64
apt-get -t jessie-backports install grub-efi (Should this not rather be "grub-efi-amd64" ?)
update-grub
grub-install (Should it rather be "grub-install --target=x86_64-efi /dev/nvme0n1" ?)
How do you think the commands should be in my case for best solution?