Chroot from existing Linux system

ronvenema · Posted: Tue May 29, 2007 8:29 pm Post subject: Chroot from existing Linux system

Hi all, I have 2007 base system installed but want to do my installs from a live system (pcLinux) so that I can do more than look at a scrolling screen for 2 days. Is there a way to work through a terminal from pclinux?

Thanks
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thorpe · Posted: Tue May 29, 2007 10:23 pm Post subject:

GivePeaceAChance · Guru Joined: 26 May 2007 Posts: 480

http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=1&chap=6

A direct link to chrooting from the handbook. A good idea might be to make a shell script to automate the process to save yourself time. I've done this because I am having to emerge stuff in chroot since Gentoo on my system currently can't connect to the internet.

Best of luck!

ronvenema

Here's the procedure that I used:

mount -t proc none /mnt/gentoo/proc
ok
cd /mnt/gentoo
ok
chroot /mnt/gentoo /bin/bash
ok
env-update
ok
source /etc/profile
Permission Denied

TIA
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Frustration leads to knowledge.

GivePeaceAChance · Guru Joined: 26 May 2007 Posts: 480

So I'm assuming you were root before these commands were entered?

Try this:

log in as root, probably 'sudo su'

Then

thorpe · Posted: Wed May 30, 2007 3:50 pm Post subject:

Dont just simply use...

ronvenema · Posted: Wed May 30, 2007 6:29 pm Post subject:

GivePeace, Thank you that seemed to do the trick.
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Frustration leads to knowledge.

GivePeaceAChance · Guru Joined: 26 May 2007 Posts: 480

Just a tip that I've been told. Might want to add [SOLVED] to the first post's subject just so people know you don't need any more help on this topic.

ronvenema · Posted: Thu May 31, 2007 1:28 pm Post subject:

I'm still having a problem. When I try to compile a program it picks up the environment of the host computer, ie: the qt libraries on the gentoo partition are located at /usr/qt/3. On the PcLinux partition they are located at /usr/lib /qt. The result is the compiling program not being able to find the qt libraries and ends with an error. This happens whether or not I issue the env-update command or not. Is there any way to resolve this? Here are the commands that I use when entering the genntoo partition:

mount -t proc none /mnt/gentoo/proc
mount -o bind /dev /mnt/gentoo/dev
chroot /mnt/gentoo /bin/bash
env-update
source /etc/profile
export PS1="(chroot) $PS1"

TIA
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Frustration leads to knowledge.

thorpe · Posted: Thu May 31, 2007 1:53 pm Post subject:

Did you read my last reply?
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Research before taking any advice from me. I'm still coming to grips with this myself.

ronvenema · Posted: Thu May 31, 2007 3:04 pm Post subject:

thorpe, when I issue the following commands I get an error:

mount -t proc none /mnt/gentoo/proc
mount -o bind /dev /mnt/gentoo/dev
env -i HOME=$HOME TERM=$TERM chroot /mnt/gentoo /bin/bash

env: chroot: No such file or directory

TIA
_________________
Frustration leads to knowledge.

ronvenema · Posted: Thu May 31, 2007 3:19 pm Post subject:

thorpe, figured it out you have to break it up into 2 commands:
chroot /mnt/gentoo /bin/bash
env -i HOME=$HOME TERM=$TERM

This then gives me the correct environment speciifally the correct location for the qt libraries. So the complete command setup would be:

mount -t proc none /mnt/gentoo/proc
mount -o bind /dev /mnt/gentoo/dev
chroot /mnt/gentoo /bin/bash
env -i HOME=$HOME TERM=$TERM
source /etc/profile
export PS1="(chroot) $PS1"

I'm continuing the build of kde-meta and so far no errors.

TIA
_________________
Frustration leads to knowledge.

thorpe · Posted: Thu May 31, 2007 3:43 pm Post subject: