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fstab file got Deleted

Dear all,

my mistake I deleted fstab file, now after booting I am getting error message saying "you don't have any Linux Partition..."
I know Kernel is not able to mount the partitions coz that file is missing... any idea what to do now; I tried rescue mode but I don't know how to proceed...
forgot to mention that /boot is a standard partition @ /dev/sda1; while /, /home, /var are LV's with address /dev/mapper/vol0-root, /dev/mapper/vol0-home, /dev/mapper/vol0-var...

Plz Help... Thnx in Advance...

SkM...

Boot from a live CD, mount your Linux partition and create a new fstab.
If you need help with that feel free to ask.

Quote:

Originally Posted by TobiSGD (Post 4452473)

Boot from a live CD, mount your Linux partition and create a new fstab.
If you need help with that feel free to ask.

Thanx for your help... I do have a Live CD but how m I gonna create fstab file... should i copy fstab file from live cd to /etc/; but how will get my fstab's detail, i mean i use UUID for mounting the partitions...

i think i have to do something else... it will be great if you can elaborate step by step process for fstab creation...

Again... Thnx for taking trouble for me...

SkM...

1. Boot from your live-CD.
2. Open a terminal.
3. Launch the command

Code:

blkid

This will show you all partitions with their UUIDs and filesystems. Here for example is the output of that command on my laptop:

Code:

tobi@dragon ~ :) % blkid

/dev/sda1: UUID="1f66de30-a6a5-448f-9bad-5b7a3fe22e1c" TYPE="swap" 

/dev/sda2: UUID="2bfe2395-c441-4ec5-89e9-9af815667a83" TYPE="ext4" 

/dev/sda3: UUID="a1632bbd-ddf3-4337-810c-6fab59077ed1" TYPE="ext4" 

/dev/sdb1: UUID="CF4A-303A" TYPE="vfat"

You can see that I have three partitions on drive sda (which is my internal disk) and one partition on an attached SD-card. The SD-card is not needed in the fstab, so we will omit that.
4. Now we will mount your Linux /-partition, in my case it is sda2:

Code:

sudo mount /dev/sda2 /mnt

You now can access all files on that partition under /mnt.
5. Create a new fstab in the mounted partition:

Code:

sudo vim /mnt/etc/fstab

Substitute vim in this command with your favorite text-editor.
6. At first we add some mounts that are necessary for a system to run properly, I just copied the entries from my fstab, you may want to have a look at your live CD's fstab to compare:

Code:

devpts          /dev/pts        devpts      gid=5,mode=620  0  0

proc            /proc            proc        defaults        0  0

tmpfs            /dev/shm        tmpfs      defaults        0  0

7. Now we add the partitions:

Code:

UUID="1f66de30-a6a5-448f-9bad-5b7a3fe22e1c"    swap    swap    defaults    0 0

UUID="2bfe2395-c441-4ec5-89e9-9af815667a83"    /    ext4    defaults    0 1

UUID="a1632bbd-ddf3-4337-810c-6fab59077ed1"    /home    ext4    defaults    0 1

Of course you have to adapt that to your needs. Substitude my UUIDs with the ones shown to you from the blkid-command. Also, if you don't have a separate /home-partition just omit that line.
8. Save that file and close the editor.
9. Unmount the partition:

Code:

sudo umount /mnt

10 Reboot and look if it works.

Okay... I got it... I will mount the '/' (in my hdd its /dev/mapper/vol0-root) to a temporary /mnt (of cd) & then i'll create the fstab file...

Thnx a lot sir... u saved my day n my linux too...

Hey Tobi,

Sorry for troubling u again...

I tried it, but I am getting different output than what u have written...

"df -h" doesn't gave any detail about the partitions in my HDD...
"blkid" there was not output
"fdisk -l" output is
/dev/sda1 Linux
/dev/sda2 Linux LVM
/dev/sda3 swap

sda2 is a PV with all LV's inside (/, /home, /var)...

"fdisk -l /dev/sda2" got message saying /dev/sda2 doesn't contain valid partition table...

"mount /dev/mapper/vol0-root /mnt" got message saying root doesn't exist...

Sorry, I can't attach the snapshot, if its required, i'll send...

Thnx...

SkM...

You may have to run the blkid command as root.

Quote:

Originally Posted by andrewthomas (Post 4452760)

You may have to run the blkid command as root.

all those commands were executed as root (using sudo)...

May be someone other can help here, I know nothing about LVM and how it handles partitions.

Are you able to login single-user or recovery mode?
If you can

Quote:

cd /etc
ls

Look for
/etc/fstab.bak

Hey...

sorry for the delay... I tried booting thru a Live CD, after that I was getting error message "System is sleeping forever" something like that... I was not able to get Grub loading screen... that's the reason Single User was not possible... & i didn't tried Rescue Mode... actually I re installed the OS, but I'll try it again... I wanna see how to recover it if fstab is missing...

I'll keep this thread open & let me try once again; I'll update here...

Anyway, Thanks for your Support...

If you're going to try it again try it in virtual box.

okay... let me try it & will update you about my situation...