recover grub2
2013-01-28 14:06 robturtle 阅读(274) 评论(0) 编辑 收藏 举报1. mount file system
$ sudo fdisk -l Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xdd5add5a Device Boot Start End Blocks Id System /dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT /dev/sda2 206848 61442047 30617600 7 HPFS/NTFS/exFAT /dev/sda3 61442048 864131071 401344512 7 HPFS/NTFS/exFAT /dev/sda4 864133118 976771071 56318977 5 Extended /dev/sda5 864133120 883662847 9764864 83 Linux /dev/sda6 883664896 942256127 29295616 83 Linux /dev/sda7 942258176 959514623 8628224 83 Linux /dev/sda8 959516672 976771071 8627200 83 Linux $ sudo blkid /dev/sda1: LABEL="M-gM-3M-;M-gM-;M-^_M-dM-?M-^]M-gM-^UM-^Y" UUID="BC9298AC92986CA0" TYPE="ntfs" /dev/sda2: UUID="4600BD5500BD4D25" TYPE="ntfs" /dev/sda3: UUID="D60A75A80A758671" TYPE="ntfs" /dev/sda5: LABEL="ubuntu-jeremy" UUID="2b55694f-69f5-4ea9-8226-c9f9056b4007" TYPE="ext4" /dev/sda6: LABEL="jeremy-home" UUID="7f0209d5-c8f2-4801-bed7-025d8115fcf8" TYPE="ext4" /dev/sda7: LABEL="ubuntu-usr" UUID="6c95fda4-5b78-4b70-8b37-a49febe4478f" TYPE="ext4" /dev/sda8: LABEL="ubuntu-var" UUID="fb1e290f-f0ca-48de-9ef7-3a2fa412b18c" TYPE="ext4" $ sudo mount /dev/sda5 /mnt && sudo mount /dev/sda6 /mnt/home && \ sudo mount /dev/sda7 /mnt/usr && sudo mount /dev/sda8 /mnt/var $ sudo mount --bind /dev /mnt/dev $ sudo mount --bind /proc /mnt/proc
2. install grub
$ sudo chroot /mnt # grub-install /dev/sda # update-grub
NOTE: check /etc/fstab before reboot.
