To run a command as administrator (user "root"), use "sudo <command>".See "man sudo_root" for details.ubuntu@ubuntu:~$ $ sudo fdisk -l$: command not foundubuntu@ubuntu:~$ sudo fdisk -lDisk /dev/sda: 500.1 GB, 500107862016 bytes255 heads, 63 sectors/track, 60801 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x0008e94c Device Boot Start End Blocks Id System/dev/sda1 1 53297 428108121 83 Linux/dev/sda2 * 53298 60427 57271725 7 HPFS/NTFS/dev/sda3 60428 60802 3005441 5 ExtendedPartition 3 does not end on cylinder boundary./dev/sda5 60428 60802 3005440 82 Linux swap / Solarisubuntu@ubuntu:~$ sudo mount /dev/sda1 /mntubuntu@ubuntu:~$ sudo mkdir /mnt/devmkdir: cannot create directory `/mnt/dev': File existsubuntu@ubuntu:~$ sudo mount --bind /dev /mnt/devubuntu@ubuntu:~$ sudo chroot /mntroot@ubuntu:/# $ nano /etc/default/grub$: command not found