root@ubuntu:/# sudo apt-get install grub
sudo: unable to resolve host ubuntu
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
efibootmgr
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
grub-common os-prober
Suggested packages:
grub-legacy-doc mdadm multiboot-doc grub-emu xorriso
The following NEW packages will be installed:
grub grub-common os-prober
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/2,868 kB of archives.
After this operation, 7,143 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Media change: please insert the disc labeled
'Ubuntu 11.04 _Natty Narwhal_ - Release amd64 (20110426)'
in the drive '/media/cdrom/' and press enter