Second attempt after rebooting at chapter 6

roshgorg · 05-17-2012, 08:35 AM

Hello, I am using LFS version 7.1, and my host is a Debian installation.
I was at chapter 6.8 when my power supply was gone, and so, as the note at chapter 6.4 say, i have to remount everything in 6.2.2 and 6.2.3 .

When i tried to remount them, the following was my output.

Code:

root@debian:/home/roshan# mount -v --bind /dev $LFS/dev
/dev on /dev type none (rw,bind)
root@debian:/home/roshan# mount -vt devpts devpts $LFS/dev/pts
devpts on /dev/pts type devpts (rw)
root@debian:/home/roshan# mount -vt tmpfs shm $LFS/dev/shm
shm on /dev/shm type tmpfs (rw)
root@debian:/home/roshan# mount -vt proc proc $LFS/proc
mount: proc already mounted
root@debian:/home/roshan# mount -vt sysfs sysfs $LFS/sys
mount: sysfs already mounted or /sys busy
mount: according to mtab, sysfs is already mounted on /sys
root@debian:/home/roshan#

Please see where I went wrong.

towheedm · 05-17-2012, 08:43 AM

When the PS failed, proc and sysfs was not unmounted. The entry is still in $LFS/etc/mtab. Could you post the contents of $LFS/etc/mtab, or delete the lines starting with proc and sysfs before remounting.

roshgorg · 05-17-2012, 08:49 AM

Quote:

Originally Posted by towheedm

When the PS failed, proc and sysfs was not unmounted. The entry is still in $LFS/etc/mtab. Could you post the contents of $LFS/etc/mtab, or delete the lines starting with proc and sysfs before remounting.

I am a newbie. Can you explain the bolded part a bit more. I mean how to do it ?
Also, should i be the lfs user for applying these mount commands ?

roshgorg · 05-17-2012, 08:54 AM

Code:

root@debian:/home/roshan# cat $LFS/etc/mtab
/dev/sda6 / ext4 rw,errors=remount-ro 0 0
tmpfs /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
sysfs /sys sysfs rw,noexec,nosuid,nodev 0 0
udev /dev tmpfs rw,mode=0755 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
devpts /dev/pts devpts rw,noexec,nosuid,gid=5,mode=620 0 0
fusectl /sys/fs/fuse/connections fusectl rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
/dev /dev none rw,bind 0 0
devpts /dev/pts devpts rw 0 0
shm /dev/shm tmpfs rw 0 0
/dev /dev none rw,bind 0 0
root@debian:/home/roshan#

/dev/sda6 is my host
i am using /dev/sda8 for lfs

towheedm · 05-17-2012, 09:01 AM

The file '/etc/mtab' keeps a record of all mounted filesystems. For example, on my host system this is my /etc/mtab:

Code:

/dev/md1 / ext4 rw,errors=remount-ro 0 0
tmpfs /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
sysfs /sys sysfs rw,noexec,nosuid,nodev 0 0
udev /dev tmpfs rw,mode=0755 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
devpts /dev/pts devpts rw,noexec,nosuid,gid=5,mode=620 0 0
/dev/md0 /boot ext4 rw 0 0
/dev/md2 /home ext4 rw 0 0
/dev/md3 /home/towheed/VirtualMachines ext4 rw 0 0
/dev/md4 /home/towheed/Downloads ext4 rw 0 0
/dev/sdb12 /home/towheed/VirtualMachines/VM_1 ext4 rw 0 0
/dev/sdc12 /home/towheed/VirtualMachines/xp_home fuseblk rw,noexec,nosuid,nodev,allow_other,blksize=4096 0 0
/dev/sdc13 /home/towheed/VirtualMachines/xp_pro fuseblk rw,noexec,nosuid,nodev,allow_other,blksize=4096 0 0
fusectl /sys/fs/fuse/connections fusectl rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
none /proc/fs/vmblock/mountPoint vmblock rw 0 0

This is a record of all mounted filesystems on my host. Now, I did LFS on /dev/sda1 and when I mount it with:

Code:

mount /dev/sda1 /mnt/lfs

my new /etc/mtab is:

Code:

/dev/md1 / ext4 rw,errors=remount-ro 0 0
tmpfs /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
sysfs /sys sysfs rw,noexec,nosuid,nodev 0 0
udev /dev tmpfs rw,mode=0755 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
devpts /dev/pts devpts rw,noexec,nosuid,gid=5,mode=620 0 0
/dev/md0 /boot ext4 rw 0 0
/dev/md2 /home ext4 rw 0 0
/dev/md3 /home/towheed/VirtualMachines ext4 rw 0 0
/dev/md4 /home/towheed/Downloads ext4 rw 0 0
/dev/sdb12 /home/towheed/VirtualMachines/VM_1 ext4 rw 0 0
/dev/sdc12 /home/towheed/VirtualMachines/xp_home fuseblk rw,noexec,nosuid,nodev,allow_other,blksize=4096 0 0
/dev/sdc13 /home/towheed/VirtualMachines/xp_pro fuseblk rw,noexec,nosuid,nodev,allow_other,blksize=4096 0 0
fusectl /sys/fs/fuse/connections fusectl rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
none /proc/fs/vmblock/mountPoint vmblock rw 0 0
/dev/sda1 /mnt/lfs ext4 rw 0 0

Notice the entry on the last line now for the mounted filesystem on /dev/sda1.

You do not need be the lfs user to delete the entries. Mount you lfs filesystem (assuming it's on /dev/sda1 and the mount point is /mnt/lfs:

Code:

mount /dev/sda1 /mnt/lfs

Now open the /mnt/lfs/etc/mtab file with your favorite text editor and delete the lines starting with proc and sysfs, copy the contents and post it.

towheedm · 05-17-2012, 09:07 AM

You can also try to unmount them if you're not comfortable with editing the file:

Code:

umount $LFS/proc
umount $LFS/sys

If the umount command gives a 'not mounted error', then you will have to delete the lines.

roshgorg · 05-17-2012, 09:24 AM

So, I am going to perform the mounting of lfs again using

Code:

mount /dev/sda1 /mnt/lfs

and the performing the following mounts

Code:

mount -v --bind /dev $LFS/dev
mount -vt devpts devpts $LFS/dev/pts
mount -vt tmpfs shm $LFS/dev/shm
mount -vt proc proc $LFS/proc
mount -vt sysfs sysfs $LFS/sys

And then continuing from where I were.

What do you suggest ?

towheedm · 05-17-2012, 09:30 AM

No, for me it was /dev/sda1. For you it will be /dev/sda8. You posted while I was typing. If you did not unmount /mnt/lfs or rebooted, then you do only have to mount proc and sysfs.

roshgorg · 05-17-2012, 09:39 AM

Quote:

Originally Posted by towheedm

No, for me it was /dev/sda1. For you it will be /dev/sda8. You posted while I was typing. If you did not unmount /mnt/lfs or rebooted, then you do only have to mount proc and sysfs.

By just giving the commands for mounting proc and sys, i got the errors like sysfs is busy or /sys is already mounted, and proc is already mounted. That is why I remounted again from mount /dev/sda1 /mnt/lfs

spiky0011 · 05-17-2012, 11:30 AM

Hi

If it was me I would reboot the system and do chapter 2.4 mounting the new partition as you did earlier, then chapter 6.2.2 and 6.2.3 then 6.4

roshgorg · 05-17-2012, 12:14 PM

Quote:

Originally Posted by spiky0011

Hi

If it was me I would reboot the system and do chapter 2.4 mounting the new partition as you did earlier, then chapter 6.2.2 and 6.2.3 then 6.4

Yeah man, you are right. Only after mounting the partition again, it worked.

Another question. Do we have to delete all the extracted directories and the <package>-build directories in chapter 9 ? I haven't read anywhere to keep those directories till now .

spiky0011 · 05-17-2012, 12:31 PM

Yes That is the end there if your system boots ok you wont be needing them anymore. Next move is onto blfs which uses completly different packages.

roshgorg · 05-18-2012, 02:14 AM

I did the instructions as given in chapter 7.2.2 of the book, and for chapter 7.2.3 (Creating the /etc/resolv.conf File), for

Code:

nameserver <IP address of your primary nameserver>

, I specified 255.255.255.0 . Is this correct.? If not what should be done ?

Is it possible to undoe changes done in network configuration and start with correct network configurration ? If so, how ?

spiky0011 · 05-18-2012, 02:49 AM

How is the pc connected to the internet. If it gpse through a router you wont need that part

roshgorg · 05-18-2012, 02:59 AM

Quote:

Originally Posted by spiky0011

How is the pc connected to the internet. If it gpse through a router you wont need that part

I use GPRS connection for accessing net. Currently, I have followed the book chapter 7.2.2 and 7.2.3 . I get to know they are not meant for my configuration. Is it possible to undo those steps I did, and continue from chapter 7.4 ?

At chapter 7.5, Where should the command prompt be ?