The chroot Technique – a Swiss army multitool for Linux systems

a_t48 · 2025-04-09T14:57:17 1744210637

Currently working on scripts to provision a drive outside of the machine it’s meant to go on using chroot. I’ve so far accidentally unmounted /dev/pts several times from the host system and running docker inside the chroot caused a hard lock. Fun stuff.

miftassirri · 2025-04-09T14:59:52 1744210792

Haha, learned this technique while installing Void Linux

bigpeopleareold · 2025-04-09T14:55:58 1744210558

Ah - my attempt at doing this was almost there, except for the few bits that kept erroring out because I didn't mount the proc,dev,etc. mountpoints correctly :) Something to give another whirl on. At the time, I wanted something simple without docker to store everything development-related using different libraries. This is where debootstrap+chroot comes in - to build against various versions of libraries in Debian (if I remember correctly - it's been awhile.)

dicroce · 2025-04-09T14:38:54 1744209534

I actually wish that instead of docker & etc we had just gotten a better chroot... Or maybe just a new kernel syscall that is chroot()++.

duped · 2025-04-09T14:58:53 1744210733

what would "better chroot" do?

zoobab · 2025-04-09T14:50:11 1744210211

Working on proot-docker, a bash script on top of skopeo and proot:

https://github.com/mtseet/proot-docker

We need more people to improve it!

nesarkvechnep · 2025-04-09T14:53:07 1744210387

Come to FreeBSD, we have just that - jails.

gnuser · 2025-04-09T14:43:51 1744209831

Pids and cgroups all the way down (also why the wise greybeards rejected docker)

mystified5016 · 2025-04-09T14:54:11 1744210451

Isn't LXC more or less an unsupervised chroot in an isolated process?

SuperNinKenDo · 2025-04-09T14:56:18 1744210578

systemd-nspawn is probably what you want.

seba_dos1 · 2025-04-09T14:35:53 1744209353

With qemu-user and binfmt you can even chroot into foreign CPU architectures, which is a handy thing to have when you mount your phone's eMMC to fix a hacking session gone wrong.

Though these days you may want to look into things like systemd-nspawn instead of plain chroot.

smallpipe · 2025-04-09T14:33:50 1744209230

The arch linux install has a little wrapper around chroot, used to configure the installed system without booting it.

https://wiki.archlinux.org/title/Installation_guide#Chroot

mystified5016 · 2025-04-09T14:55:15 1744210515

Manjaro has the same, I'd assume inherited from arch and modified.

I just wish the script could figure out a BTRFS drive without me manually mounting volumes :(

znpy · 2025-04-09T14:49:29 1744210169

Gentoo’s stage3 would like to say a word

（评论） (comments)

（评论）
(comments)