Linux Row Error Delete/etc/fstab and/boot how to recover

Experiment: In the case of partitioning, rm-rf/boot and/etc/fstab, recovery

First of all, we look at what is put in the/etc/fstab inside, you can see that the storage is the partition of the mount situation, delete partition will not be automatically mounted

Next check/boot is stored in Linux core file/boot/vmlinuz-version-release, and boot loader grub, auxiliary kernel load hardware-driven pseudo-root system/boot/ Initramfs-version-release.img, missing these items will cause Linux to not boot

Okay, I'm going to start deleting it.

Rm-rf/boot/etc/fstab; reboot

You can see the machine. Error code ERROR15 to remember this phenomenon, later encountered the same problem will know why

The repair process is divided into two steps

Fix/etc/fstab

1 into the rescue mode, the process will no longer be exhausted, the use of DF to view the partition condition found that the partition cannot be mounted to the/MNT/SYSIMAGE,LSBLK command is not available

Well, fortunately fdisk-l can still use, but we have no way to know the mount of the partition, do not know which partition is mounted in/under, which mount the/app, but we remember each partition under the characteristics of the file, just now no mount no way to view, so we can try to mount, in the following partition list in/dev /SDA1 behind A *, all it is boot-up, should be mounted in/boot,/DEV/SDA5 is the swap partition mounted under/swap, but which is/cannot be judged

2 we create a temporary mount point

Mkdir/mnt/tmp

3 Mount/dev/sda{1,2 ...} separately/mnt/tmp

4 View the file ls/mnt/tmp under the partition to find out the partition attached to/directory with the file characteristics

6 Creating a partitioned information table Vim/etc/fstab

Vim/mnt/tmp/etc/fstab

/dev/sda1/boot EXT4 Defaults 0 0

/DEV/SDA2/EXT4 Defaults 0 0

/dev/sda3/app EXT4 Defaults 0 0

/DEV/SDA5 swap swap defaults 0 0

Exit;exit

So far the/etc/fstab has been repaired and the next fix/boot we reboot the discovery still does not start, the error message becomes as follows, only one cursor

Fix/boot

Method One:

1 re-enter rescue mode, with DF View, partition has been automatically mounted mounted to/mnt/sysimages successfully

2 mounting the CD, installing the kernel

Mkdir/mnt/cdrom

Mount/mnt/cdrom

rpm-ivh/mnt/cdrom/packages/kernel.xxx.rpm--root=/mnt/sysimages--force

3 cutting root, repairing grub

Chroot/mnt/sysimage

Grub-install--ROOT-DIRECTORY=/MNT/SYSIMAGE/DEV/SDA

4 Writing Grub.conf

Vim/boot/grub/grub.conf

Default=0

Timeout=5

Title Linux

Kernel/vmlinuz-2.6.32-696.el6.x86_64 root=uuid=6da11b60-dd80-460a-a00f-beb8b3373b5c

Initrd/initramfs-2.6.32-696.el6.x86_64.img

Exit;exit

Method Two:

1-in rescue mode

2 Cutting root: Chroot/mnt/sysimage

3 fix/boot/initramfs:mkinitrd/boot/ininramfs-' uname-r ' uname-r '

4 Mounting discs: mount/dev/sr0/mnt

5 copying the disc core to/boot:cp/mnt/isolinux/vmlinuz-2.6.32-696.el6.x86_64/boot

6 Fix Grub:grub-install--ROOT-DIRECTORY=/MNT/SYSIMAGE/DEV/SDA

7 Writing/boot/grub/grup.conf

Vim/boot/grub/grub.conf

Default=0

Timeout=5

Title Linux

Kernel/vmlinuz-2.6.32-696.el6.x86_64 root=uuid=6da11b60-dd80-460a-a00f-beb8b3373b5c

initrd/initramfs-' uname-r '. img

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Linux Row Error Delete/etc/fstab and/boot how to recover