A question on LFS LiveCD

satimis · 08-10-2005, 03:51 AM

Hi folks,

The files on the LiveCD could not be read if it is not running. After mounting only boot and source directories can be seen. However on running all directories can be read such as /root, /home, /bin, /usr, etc. Could it be possible to view them if the LiveCD is not running?

TIA

B.R.
satimis

Oliv' · 08-10-2005, 07:27 AM

Hi,

yes I think that's possible if you mount the file containing the main filesystem in loopback... You'll need to know the FS used by the liveCD (squashfs I think, so you'll have to patch you kernel to enable it)

Oliv'

satimis · 08-10-2005, 08:58 AM

Hi Oliv,

Tks for your advice.

Quote:

I think that's possible if you mount the file containing the main filesystem in loopback...

Whether you meant to run

# mount -t filesys /dev/hdd /mnt/cdrom

Quote:

You'll need to know the FS used by the liveCD (squashfs I think,

How to find it out?

Quote:

so you'll have to patch you kernel to enable it)

Please explain in more detail how to do it.

TIA

B.R.
satimis

Oliv' · 08-10-2005, 09:21 AM

Quote:

Whether you meant to run

# mount -t filesys /dev/hdd /mnt/cdrom

yes but that's something like:
# mount -t squashfs -o loop=/dev/loop0 /mnt/cdrom/lfs.img /mnt/loop/
for more info about squashfs: http://squashfs.sourceforge.net/
http://tldp.org/HOWTO/SquashFS-HOWTO/
To be simple, squasfs is a Read-only FS used by liveCD

satimis · 08-10-2005, 10:21 AM

Hi Oliv,

I see just like reading ISO image;
# mount /mnt/cdrom/lfs.img -t squashfs -o loop /mnt/livecd

But I could not find lfs.img

# mount /dev/hdd /mnt/cdrom/
# ls /mnt/cdrom/

Code:

boot  LFS  sources

# ls -al /mnt/cdrom/boot/

Code:

total 8
drwxr-xr-x  3 root root 2048 Jul 13 04:26 .
drwxr-xr-x  4 root root 2048 Jul 13 05:58 ..
-r--r--r--  1 root root 2048 Jul 13 05:58 boot.cat
drwxr-xr-x  2 root root 2048 Jul 13 05:41 isolinux

# ls -al /mnt/cdrom/boot/isolinux/

Code:

total 2675
drwxr-xr-x  2 root root    2048 Jul 13 05:41 .
drwxr-xr-x  3 root root    2048 Jul 13 04:26 ..
-rw-r--r--  1 root root     126 Jul 13 05:41 boot.msg
-rw-r--r--  1 root root  128066 Jul 13 04:50 initramfs_data.cpio.gz
-rw-r--r--  1 root root   10388 Jul 13 04:52 isolinux.bin
-rw-r--r--  1 root root     190 Jul 13 05:41 isolinux.cfg
-rw-r--r--  1 root root     950 Jul 13 05:41 keymaps.msg
-rw-r--r--  1 root root 2580706 Jul 13 04:45 linux
-rw-r--r--  1 root root    1622 Jul 13 05:41 locales1.msg
-rw-r--r--  1 root root    1537 Jul 13 05:41 locales2.msg
-rw-r--r--  1 root root    1005 Jul 13 05:41 options.msg
-rw-r--r--  1 root root    7630 Jul 13 05:41 splash.lss

# ls -al /mnt/cdrom/LFS

Code:

-rw-r--r--  1 root root 11 Jul 13 05:58 /mnt/cdrom/LFS

# ls -al /mnt/cdrom/sources/ | grep .img
No output

B.R.
satimis

Oliv' · 08-11-2005, 02:45 AM

Hi,

sorry

you're right... I've put lfs.img as I don't know the real name and most of time that's an .img file.
In fact the interesting file is: /mnt/cdrom/boot/isolinux/linux

Oliv'

satimis · 08-13-2005, 05:29 AM

Hi Oliv',

FedoraCore3

I have got squashfs driver on the box.

# cat /proc/filesystems | grep squashfs
# cat /proc/filesystems | grep sq*
Both without printout.

# modprobe squashfs

Code:

FATAL: Module squashfs not found.

How to get it fixed.

TIA

B.R.
satimis

Oliv' · 08-17-2005, 07:22 AM

Hi satimis,

In fact I told you nonsense last time

Quote:

In fact the interesting file is: /mnt/cdrom/boot/isolinux/linux

linux file is in fact the kernel... I've booted this week end LFS live CD6.0 and saw that "linux" file was the kernel, there was a file called "etc.tar.bz2" which was /etc dir... and /usr is in a file called usr_sqfs
where did you install squashfs module... have you try to go in the local directory and do an "insmod squasfs.o" ??? I suppose that's a misconfiguration of "modprobe"...

Oliv'