root@ubuntu:/# sudo apt-get purge grub* os-prober
sudo: unable to resolve host ubuntu
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'grub-gfxpayload-lists' for regex 'grub*'
Note, selecting 'grub-pc' for regex 'grub*'
Note, selecting 'grub' for regex 'grub*'
Note, selecting 'grub-common' for regex 'grub*'
Note, selecting 'grub-legacy-doc' for regex 'grub*'
Note, selecting 'grub-coreboot' for regex 'grub*'
Note, selecting 'grub-efi-amd64' for regex 'grub*'
Note, selecting 'grub-efi-ia32' for regex 'grub*'
Note, selecting 'grub-ieee1275' for regex 'grub*'
Note, selecting 'grub-emu' for regex 'grub*'
Note, selecting 'grub-doc' for regex 'grub*'
Note, selecting 'grub-efi' for regex 'grub*'
Note, selecting 'grub-linuxbios' for regex 'grub*'
Note, selecting 'grub-yeeloong' for regex 'grub*'
Note, selecting 'grub-legacy' for regex 'grub*'
Note, selecting 'grub2' for regex 'grub*'
Note, selecting 'espresso-grub' for regex 'grub*'
Package grub-gfxpayload-lists is not installed, so not removed
Package grub is not installed, so not removed
Package grub-common is not installed, so not removed
Package grub-efi-amd64 is not installed, so not removed
Package grub-efi is not installed, so not removed
Package grub-pc is not installed, so not removed
Package os-prober is not installed, so not removed
The following packages were automatically installed and are no longer required:
efibootmgr gettext-base libfuse2
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.