32-Bit Chroot How-To

[trinaryouroboros]

instead of:

# sudo cp /etc/passwd /chroot/etc/
# sudo cp /etc/shadow /chroot/etc/
# sudo cp /etc/group /chroot/etc/
# sudo cp /etc/sudoers /chroot/etc/
# sudo cp /etc/hosts /chroot/etc/

you can use:

# sudo mount --bind  /etc/passwd /chroot/etc/passwd
# sudo touch /chroot/etc/shadow
# sudo mount --bind /etc/shadow /chroot/etc/shadow
# sudo mount --bind /etc/group /chroot/etc/group
# sudo mount --bind /etc/sudoers /chroot/etc/sudoers
# sudo mount --bind /etc/hosts /chroot/etc/hosts

with the appropriate entries in /etc/fstab of course.

then changes from the 64bit host system will be propagated to the 32bit chroot.

And for installing debian sid in the chroot:
# debootstrap --arch i386 sid /chroot <url-to-local-debian-mirror>

hope this helps

http://ubuntuforums.org/showthread.p...d=1#post361939

killall esd

restart firefox32 - sound is back.

[trinaryouroboros]

At this point you should have a 32 bit environment setup with synaptic setup. When you run synaptic32 from your main environment it will chroot execute it and all installations will be made to your 32 bit environment. If you want to be able to easily launch 32 bit chroot apps from your 64 bit environment symlink the app name to /usr/local/bin/do_dchroot. If you're using this as desktop system you'll probably want to use synaptic to install x, gnome, ubuntu specific themes, etc.

Please let me know of any errors, enhancements, or corrections

I have an issue with this chroot. I've modified the fstab slightly, in the first post, here's the only add's :

#

* /media/cdrom0 /chroot/media/cdrom0 none bind 0 0
* /media/cdrom1 /chroot/media/cdrom1 none bind 0 0
* /usr/share/fonts /chroot/usr/share/fonts none bind 0 0

# sudo mkdir /chroot/media/cdrom0
# sudo mkdir /chroot/media/cdrom1

Now after reboot, I can access cdrom0 and cdrom1 just fine with my normal interface:

root@w0-rm-h0-l3:/media # cd cdrom0
root@w0-rm-h0-l3:/media/cdrom0 # ls
autorun.exe DirectX7 _INST32I.EX_ Readme.txt _sys1.cab
autorun.ico Docs ip.cfg _Setup.dll _sys1.hdr
autorun.inf Dsetup.dll Ip.exe Setup.exe Tapsplash640.bmp
ConfigINI.exe dxMedia.exe _ISDel.exe SETUP.INI _user1.cab
data1.cab Eaukhelp.hlp lang.dat setup.ins _user1.hdr
data1.hdr Eula.txt layout.bin SetupInstall.exe
DATA.TAG FinalSetup.exe os.dat setup.lid

But, when I try to access these drives from chroot :

root@w0-rm-h0-l3:/media/cdrom0 # chroot /chroot
root@w0-rm-h0-l3:/ # cd /media
root@w0-rm-h0-l3:/media # cd cdrom0
root@w0-rm-h0-l3:/media/cdrom0 # ls
root@w0-rm-h0-l3:/media/cdrom0 #

Nada, zip, zilch.

What am I doing wrong here? There's got to be some way to get the cdroms to be recognized and mountable in the chroot here...

[Sockpuppet]

/usr/bin/dchroot -d "`echo $0 | sed 's|^.*/||'` $*"

I don't quite understand this. Using this and calling "do_dchroot firefox --verbose", the script will call

/usr/bin/dchroot -d "do_dchroot firefox --verbose"

so it will call do_dchroot in the chrooted directory, which isn't there.

Is there some bit I am missing?

[Sockpuppet]

Made sure all instances of firefox are closed (you can not run both 32 and 64 bit firefoxes at the same time afaik... it just spawns a new 64 bit thread when you launch the old.

Yes, you can. You have to modify /usr/lib/mozilla-firefox/firefox for this. The PING_STATUS will determine if the script uses an existing browser running on the X server or if it starts a new one, It's enough to add these two lines:

diff -c5 /usr/lib/mozilla-firefox/firefox /chroot/usr/lib/mozilla-firefox/firefox
*** /usr/lib/mozilla-firefox/firefox    2005-09-22 20:02:48.000000000 +0200
--- /chroot/usr/lib/mozilla-firefox/firefox     2005-09-28 01:53:55.000000000 +0200
***************
*** 367,376 ****
--- 367,379 ----
      DISPLAY="${CMDLINE_DISPLAY}" ${MOZ_PROGRAM} -remote 'ping()' \
          > /dev/null 2>&1
      PING_STATUS=$?
  fi
  
+ # force standalone start
+ PING_STATUS=2
+ 
  echo_vars PING_STATUS
  
  # Clean user profile if we are not trying to use the running instance and only
  # if the check was successful (status 2)
  if [ "${REMOTE}" -eq 0 ] && [ "${TRY_USE_EXIST}" -eq 0 ] && [ "${PING_STATUS}" -eq 2 ]; then

I have also added a diversion of the .mozilla folder in /etc/fstab to make sure that the two browsers are not interfering with each other

/home/sockpuppet/.mozilla32 /chroot/home/sockpuppet/.mozilla none bind 0 0

For that, one has to mkdir ~/.mozilla32, of course.

One bad thing about the the "remote" call used by the Mozilla shellscripts to find an existing browser instance is that one cannot tell if it is talking to the 32 or the 64 bit browser.

So I still need to find out how one can make sure that clicks in other applications will always be opened by the 64 bit browser.

[Sockpuppet]

Yes, you can.

Problem is, of course, that now the two browsers look absolutely identical. (In my case, there is one difference: German menus for 64 bit and English for 32 bit, but that's too subtle to notice it while working with it.)

Is there any way I can force a colour scheme onto firefox, so that I can run the 32 bit firefox with a different menu / background colour?

[Sockpuppet]

Is there any way I can force a colour scheme onto firefox, so that I can run the 32 bit firefox with a different menu / background colour?

I have "solved" this now by using a suitably ugly firefox theme for the 32 bit version to tell them apart. But I don't really like this, so I will try to find a way to change the application's GTK colour theme through the console.

Also, the firefox callup script needs to be changed to identifying the 32 and the 64 bit apps on the system. Right now, I can close the 64 bit version and if I then try to restart it, "remote ping" will find the already running 32 bit version and open a new window there.

[benkong2]

I have an amd64 with breezy installed and have run into the following problem:

I took these steps:
# sudo apt-get install dchroot debootstrap
# sudo mkdir /chroot/
# sudo gedit /etc/dchroot.conf

* Add this line: hoary /chroot

# sudo debootstrap --arch i386 hoary /chroot/ http://archive.ubuntu.com/ubuntu
# sudo chroot /chroot/

now when I get to the sudo chroot /chroot/

I get this error:
"chroot: cannot run command `/bin/bash': No such file or directory"
all goes well until I execute this command the chroot dir is in the / directory I tried cd /chroot/ then issuing the command got the same error.

Since all others have had such great success I know it must be my error.

Thanks for any help.

[benkong2]

Hey thanks nevermind I figured it out. bad on me I did not place a space between the hoary /chroot/ and the http: stuff so debootstrap made my directory structure /chroot/http:/archive/ubuntu/com/ubuntu/ then I got the normal directory structure.

So I did a:
cd /http:/archive/ubuntu/com/ubuntu/
sudo mv * /chroot/
sudo rm -drf /chroot/http:

after that all worked well now I am after flash-macromedia. Which BTW is the only reason I needed to do this in the first place.

Thanks for what I know would have been a great answer.

[kb_ganesh]

i work from behind a proxy server..so, i guess you can add a section in the first post mentioning how to first set the proxy settings for wget(which is used by the 4th step, namely
sudo debootstrap --arch i386 hoary /chroot/ http://archive.ubuntu.com/ubuntu )..which involves editing ~/.wgerc to include these lines..

http_proxy = <proxy_addy>
use_proxy = on
wait = 15

i dont think anyone would use wget at all what with d4x and synaptic to do all the work..just a thought..(came out of personal experience )

[alesdoc]

in my laptop the howto does'nt work. If i write:

dchroot -d

i receive

Executing shell in 'breezy' chroot.

but if i give

sudo apt-get install synaptic

i receive nothing...so i can't proceed with the howto.

if i write

exit

i receive this:

dchroot: Child exited non-zero.
dchroot: Operation failed.

i've added

snip /

ideas?