Collection of installation & troublshooting info related to my linux (debian/mint/ubuntu) installations

Boot

https://wiki.archlinux.org/index.php/boot_debugging

Grub2 installieren

http://askubuntu.com/questions/207663/cannot-update-grub-with-paramters-on-live-usb
http://askubuntu.com/questions/88384/how-can-i-repair-grub-how-to-get-ubuntu-back-after-installing-windows
grub-install sollte trotz "cow" korrekt funktionieren.
update-grub muss wohl aus chroot gemacht werden.

mount --bind /mnt/ext-drive/boot /boot # boot dir is external drive, and hide actual /boot
grub-install [--recheck] --root-directory=/mnt/ext_drive /dev/sdc]

 --recheck: upgrades devices.map

update-grub (installs to /boot)
oder
@sudo grub-mkconfig -o /boot/grub/grub.cfg

Probleme aus Bootable:
z.B. Mint 17-1
http://askubuntu.com/questions/254491/failed-to-get-canonical-path-of-cow

You sound also use this command enter from tty2:
  os-prober
  grub-update
and then enter:
  hash -it / -d
could might work fine.

complexere grub.cfg

submenu title [--class=class …] [--users=users] [--unrestricted] [--hotkey=key] [--id=id] {
configfile grubsub.cfg
}

Grub2 ab iso booten

https://help.ubuntu.com/community/Grub2/ISOBoot

/etc/grub.d/
40_custom (Menuentry-Eintrag vornehmen)

anschliessend auf cmdline grub.cfg neu generieren:

 @sudo grub-mkconfig -o /boot/grub/grub.cfg

#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
# iso auf ->ntfs, 3-Partition gemaess "blkid"
menuentry 'ISO Precise ' {
insmod ntfs
set isofile="/ubuntu-12.04.1-desktop-i386.iso"
loopback loop (hd0,3)$isofile
linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile noprompt noeject
initrd (loop)/casper/initrd.lz
}

#danach : sudo grub-mkconfig -o /boot/grub/grub.cfg  (Neue Generierung) 
#Achtung bei qemu: Resultate bei Tests qemu -hda /dev/sda koennen noch ungeyned sein.