Debian Installer: fix uefi efi grub install

It is possible that debian installer grub-install –force "dummy" failed" to install the uefi bootloader. grub-installer: info: Running chroot /target grub-install –force "dummy" grub-installer: Installing for x86_64-efi platform. grub-installer: grub-install: warning: Cannot set EFI variable Boot0012 grub-installer: grub-install: warning: vars_set_variable: write() failed: No space left on device grub-installer: grub-install: warning: _efi_set_variable_mode: ops->set_variable grub-installer: grub-install: warning: failed-to register the EFI boot entry Press F2 to switch to debian installer second console Mount the efivars partition; changeroot to target; install grub again Verify via efibootmgr Switch back: Press F1 and reinstall grub via installer Command line:
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How to rescue a system

Boot into a grml.org rescue system. Rescue workplace How to setup my workplace, if the disk which needs rescue is /dev/vda2: fsck /dev/vda2 mkdir -p /mnt/rescue mount /dev/vda2 /mnt/rescue for i in /dev /dev/pts /sys /proc; do mount -B $i /mnt/rescue$i; done chroot /mnt/rescue /bin/bash export LC_ALL=C Rescue an encrypted disk cryptsetup luksOpen /dev/sda3 sda3_crypt vgchange -a y mount /dev/xy-vg/root-lv /mnt/target Rescue a UEFI based system Inspired by this page.
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BIOS Update with bootable USB ISO (Linux)

Download *.iso image: sudo apt-get install grub-imageboot sudo mkdir -p /boot/images sudo cp /home/youruser/Downloads/6uuj12uc.iso /boot/images sudo update-grub Wenn das Update fehlschlägt, von einem externen USB-Stick updaten: geteltorito -o bios.img g2uj18us.iso dd if=bios.img of=/dev/sdX bs=1M Boot from USB Stick. Updading the bios on lenovo laptops from linux Creating a bootable USB drive from an ISO image apt-get install syslinux-utils isohybrid path/to/image.iso lsblk dd if=path/to/image.iso of=/dev/sdX https://www.
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How to debug the linux kernel

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