How to make ubuntu 32 bit environment using chroot on Ubuntu 12.04 64 bit

How to make ubuntu 32 bit environment using chroot on Ubuntu 12.04 64 bit

1. Setup basic chroot

$ sudo apt-get install debootstrap
$ sudo apt-get install schroot
$ sudo mkdir /var/chroot/
$ sudo editor /etc/schroot/schroot.conf

Fill /etc/schroot/schroot.conf with below (Assuming your account is king)

[lucid]

description=Ubuntu Lucid

#location=/var/chroot

directory=/var/chroot/

personality=linux32

priority=3

users=king

root-users=king

groups=sbuild

root-groups=root

Note:

• personality: Enable this line if the host system is 64-bit running on an amd64/x64 computer and the chroot is 32-bit for i386. Otherwise, leave it disabled.

After modifying schroot.conf, donwload lucid data from the Ubuntu repository

$ sudo debootstrap --variant=buildd --arch i386 lucid /var/chroot/ http://kr.archive.ubuntu.com/ubuntu/

Useful settings

$ sudo mount -o bind /proc /var/chroot/proc
$ sudo ln -f /etc/apt/sources.list /var/chroot/etc/apt/sources.list

2. Entering chroot envrinment

After basic installation of Ubuntu Lucid completion, run below command to change to chroot environment with root account.

$ $ sudo chroot /var/chroot
or
$ schroot -c lucid -u root

In chroot, install basic ubuntu package by running below command

# apt-get install ubuntu-minimal
# apt-get update

If you notice any error somthing like "GPG error ... public key is not available: KEY_VALUE", then you can run below command to add the public key so that make "apt-get update" end with no such error and rerun "apt-get update" to complete all setup.

# apt-key adv --keyserver keyserver.ubuntu.com --recv-keys <KEY_VALUE>

Now you are ready to use full 32 bit app development in Ubuntu Lucid version.