Questions tagged [chroot]

a linux command to change the filesystem root a process can see, limiting it's access to the real filesystem root

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8 votes
2 answers
4k views

debootstrap failing to mount /proc

I have researched this, and none of the answers (so far) on here, nor googling seem to match my problem. Here is the situation: I am running Xubuntu 12.04 as a base install, and am trying to set up a ...
0 votes
1 answer
114 views

Jailkit: does it work in 22.04?

I'm following these instructions for setting up sftp and scp (although I'd like to add rsync too) but when the jailed account logs in, it immediately disconnects without any errors I can see. The doc ...
1 vote
1 answer
2k views

Download Ubuntu rootfs

Similar to what is possible with Alpine Linux is there a place where I can download some kind of official "core" rootfs of Ubuntu, mainly for chroot purposes?
3 votes
3 answers
10k views

sudo: unable to allocate pty: No such device

Ubuntu 22.04.01 LTS Gnome Changed python version which resulted in inability to access Terminal and a few other things. Used a liveUSB and then selected to try ubuntu. In that terminal entered: sudo ...
0 votes
0 answers
91 views

Tool for creating a minimal chroot environment

I want to run a program in a smallest possible chroot environment with just the binary and necessary shared libraries present. Is there a tool for creating such an environment? I tried debootstrap but ...
0 votes
0 answers
140 views

Ubuntu 22.04 won't reboot

Upgraded Ubuntu 20.04 to 22.04 - everything worked fine. Then I tried activating unattended-upgrades and let it install a new kernel and reboot. Machine never recovered. Grub has the following kernels ...
0 votes
0 answers
135 views

coustomizin ubuntu 23.10

I am currently in the process of creating a custom Ubuntu 23.10 ISO with a specific aim to initiate a minimal desktop environment along with a designated startup application when booted from a USB ...
2 votes
1 answer
4k views

Network Manager missing after update: no connectivity

After an update and restart, I found that the network icon on the top is missing and so, I cannot connect to LAN, wifi, USB modem, nothing. Now, I am booting from a Live USB, then chrooted to my ...
0 votes
1 answer
6k views

Can't launch Qt Creator in Ubuntu 18.04

My environment initially had qt4 and Qt Creator seemed to work fine back then. I installed qt5 and after that Qt Creator does not launch anymore. Qt Creator works fine in my virtual machine however. ...
0 votes
0 answers
132 views

Not able to install and update ubuntu 22.04 drivers using bootable ubuntu 22.04

I was trying to install a software that was giving me some gpu errors so i decided to downgrade my nvidia driver from 535 to 525. While doing so I got error in additional drivers app in Ubuntu. So ...
1 vote
1 answer
922 views

I accidentally run command "chmod 555" on system directories [duplicate]

I accidently ran sudo chmod 555 / and now all users have lost access to the server Error: Last login: Thu Oct 18 16:50:55 2023 Could not chdir to home directory /home/User1: Permission denied /bin/...
0 votes
0 answers
7k views

How to resolve grub-probe error: disk lvmid/xxx not found

I encounter an error stating "lvmid not found" when running the grub-probe command. # grub-probe --target=fs_uuid / grub-probe: error: disk `lvmid/R9xUrf-ONd8-wCXx-qfxt-m5Ox-JwKG-LrcAZI/...
0 votes
0 answers
20 views

Upgrading an old dusty 20.04 installation on a new motherboard, ethernet not working

I have an old 20.04.1 Ubuntu installation that wasn't touched since 2020, that I need to boot on to revive an old development project that was let unfinished. The motherboard & CPU changed and are ...
0 votes
0 answers
147 views

Recover brocken libs with live USB and chroot

I have the following problem: I had to mingle with some libs to build a project successfully. After I rebuild one of those libs (libtirpc) something broke and I was not able to either sudo nor use apt ...
0 votes
0 answers
105 views

Ubuntu ISO with Autoinstall over chroot

I'm tasked with migrating 200 physical CentOS 7 servers to a custom Ubuntu 22.04 ISO. This custom ISO comes pre-configured with Autoinstall and seamlessly installs on any server or VM. However, I'm ...
1 vote
0 answers
24 views

sftp into chroot works fine, but debug messages reveil non-chroot authorized_keys absolute path

I have configured per-user chroot environments for SFTP to go into /somedir/jail/$user: snippet from my /etc/ssh/sshd_config: Match User myname AllowTcpForwarding no X11Forwarding no ...
1 vote
0 answers
276 views

Chroot into an encrypted ZFS installation from live media or alternatives

For some reason, usb-guard decided to remove all of the rules I have written that allowed my keyboard and mouse. I've had this happen before from myself messing up the configuration, but this setup ...
27 votes
6 answers
144k views

During a chroot attempt, I got this error: "chroot: failed to run command '/bin/bash': Exec format error"

I was following the instructions of this tutorial HOWTO: Purge and Reinstall Grub 2 from the Live CD, when I encountered an error at step 1, as I launched the command sudo chroot /mnt/temp The error ...
1 vote
1 answer
470 views

How to automount with a chroot?

So in a chroot I have a /etc/fstab file. If I run mount -a in the chroot, it mounts the partitions listed. However, even when using the auto option, they do not mount when entering the chroot. What ...
0 votes
1 answer
65 views

How to use gnome keyring under my chroot?

I have a debian bullseye chroot in which I use svn. I want to save my password somewhere. One of the means to do so is to use gnome-keyring password store. What should I configure in order to allow ...
4 votes
10 answers
44k views

VirtualBox error: Kernel driver not installed (rc=-1908) (running ubuntu 20.04 on a chromebook through crouton)

When I try to start a virtual machine in VirtualBox, I get the error above. I tried what it asked me to do, but it didn't work. My kernel version is 4.4.232. Also, here is the error message: The ...
-3 votes
1 answer
143 views

Configure postgresql from CUBIC chroot

I'm customizing a Lubuntu 22.04 image to have a ready-to-use environment after installation. One of the points - I need to have postgresql installed and configured, means that a database is created ...
1 vote
0 answers
297 views

Run Ubuntu Touch in chroot container on Android

On my Fairphone 4 I got Ubuntu running in a chroot container using Linux Deploy. I'd like to try out Ubuntu Touch, but I don't want to wipe my phone just to do that. Is it possible to either run ...
1 vote
0 answers
1k views

Access to Files Outside the Home Directory Chroot - For every Users

I want to allow access to /var/www/dev/ to every user in my system (+50) via their home directory (so they can access via FTP with chroot_local_user=YES) For one particular user I can do: mkdir /...
2 votes
1 answer
477 views

How to allow SSH chroot user to restart apache on host?

My first post here on Ask Ubuntu. I have an LAMP Ubuntu server which has two vhosts defined in /etc/apache2/sites-enabled. One of these sites (an external mirror site) must be maintained by an ...
2 votes
1 answer
676 views

How to correctly run graphical application in schroot with Qt and D-Bus?

I was trying to get Audex running inside 16.04 LTS schroot on the 20.04 LTS host. The below method works normally for Gtk-based applications, I have tested it. In current case I did the following: ...
0 votes
0 answers
193 views

ChromeOS crouton Ubuntu Unity return with noexec error on 128GB SD card

I just installed Ubuntu Unity chroot on my HP 19"5' chromebook in dev mode and everything went fine until I tried to run it. The SD is formatted to ext4 and already has Linux installed, but when ...
1 vote
0 answers
426 views

dbus package installation is failing in ubuntu(22.04) chroot environment

I am trying to create a customized ubuntu iso using the ubuntu(22.04) chroot virtual environment. In chroot environment, facing issues while installing dbus package. Error logs are attached below. ...
1 vote
2 answers
240 views

Run GUI apps inside fakechroot debootstrap

I'm following the tutorial on https://github.com/dex4er/fakechroot. I'm trying to install and run some apps keeping them isolated on an unprivileged user, without root. They are proprietary software ...
0 votes
0 answers
50 views

patch file creation var/lib/dpkg/status is failing in chroot environment in ubuntu

I am creating customized iso using chroot and fakeroot utility in ubuntu 22.04. In the end, while creating diff in chroot env using the patch -p1 command (mentioned full command below) getting an ...
1 vote
0 answers
174 views

Debugging a binary inside a snap

I am trying to run a binary that's from a snap through strace to debug its workings. Because the executable is accessed via /snap/bin/prog which is symlinked to /usr/bin/snap I will only see snap's ...
0 votes
2 answers
2k views

What happens if I do `mount --bind /dev` to a chroot directory and I remove it inside the chroot directory?

What happens if I do mount --bind /dev to a chroot directory and I chroot to the chroot directory and inside remove the /dev/ folder. I thought my host's /dev directory will be deleted but the web ...
1 vote
0 answers
1k views

How do I chroot into a partition on which Ubuntu 20.04 is installed to run update-grub on it? Grub menu is not appearing with Windows 10 dualboot

Hello dear programmers and users. This is going to be a long and descriptive question with a series of smaller questions leading up to the main question so please read with some patience. I have a ...
0 votes
0 answers
49 views

Cannot show ubuntu login screen after edit some keyboard layout config files

I wanted to install the mtgap keyboard layout, so I go to the its github page https://github.com/kenranunderscore/mtgap-layout and do the following: sudo cp xkb/mtgap_30 /usr/share/X11/xkb/symbols/ ...
1 vote
0 answers
475 views

Upgrade Ubuntu 20.04 to 22.04 in chroot'ed environment?

Currently I use a Ubuntu 20.04 running on my Android phone. It is a chroot'ed environment running as a subsystem under Android. It is called 'Andronix' which cooperates with 'Termux' a package based ...
0 votes
0 answers
137 views

Troubleshooting a bash script using chroot. Are there differences between 20.04 and 22.04?

I am using a bash script that does things under a chroot. It was working well a long time ago like this : copy stuff here and there then sudo chroot . su - root -c "\ set -o xtrace ; \ cd /tmp/...
1 vote
0 answers
817 views

Replace Chrome OS and install Ubuntu on an Lenovo C330 ARM processor laptop

I have tried everything. Developer mode and cd;bash <(curl https://johnlewis.ie/flash_cb_fw.sh) which just restarts my laptop and beeps. I've tried booting from USB but it just beeps when I try ...
1 vote
0 answers
225 views

What is the first line of the output of `ldd bash` and why is not required when setting a new root directory to use with chroot?

I am following a tutorial about how to use chroot and set up a jailed dir. The process is to copy bash and the libraries it depends on into the 'jail' dir. To find the libraries bash depends on I ...
0 votes
0 answers
310 views

How to update to the latest bionic beaver in chroot environment

I've inherited a load of source code from some contractors. This build works on Ubuntu 18.04.06. Trying to build on previous versions of Ubuntu do not work as package dependencies are missing and the ...
4 votes
5 answers
14k views

/dev/null permission denied in chroot environment

I have Xubuntu 18.04 in a chroot environment. I just dropped it in there from a VM I had of it. Going into the chroot environment, if I try to run apt update I get this error: /usr/bin/apt-key: 624:...
1 vote
2 answers
3k views

Replace XFce4 with Cinnamon without Log-In Screen

I have a Google I/O Chrome Pixel that I've been playing around with Crouton. This is my first real shot at Ubuntu and have made the upgrade from 12.04 -> 13.04. Using chroot, I can run both Chrome ...
18 votes
6 answers
13k views

How do I stop all processes in a chroot?

I have a number of LVM partitions, each containing an Ubuntu installation. Occasionally, I want to do an apt-get dist-upgrade, to update an installation to the most recent packages. I do this with ...
1 vote
0 answers
155 views

Can I set up a samba share to a chroot jail user

I am using U unti server 18.04. I have a chroot jail for untrusted users. I would like to set up a samba share to a chroot directory. Is this possible?
0 votes
0 answers
279 views

Undo `mount --rbind /dev ./chroot/dev`

I've executed mount --rbind /dev ./chroot/dev for using in chroot'ed environment. Then I wanted to unmount it and executed umount ./chroot/dev but it fails with error: umount: ..../chroot/dev: target ...
0 votes
0 answers
67 views

How to keep synchronized in real time two Ubuntu installations?

I'm looking for the better tool /method / technique that can help me to keep synchronized in real time two Ubuntu installations. I want that every change I make to one of them will be immediately ...
0 votes
0 answers
533 views

reinstall ubuntu-desktop after accidently removed ibus [duplicate]

I accidentally removed ibus on my ubuntu 16 which is upgraded from 14.04 and suddenly I have unmet dependencies, broken packages, etc. I managed to chroot into the system using a live-cd-usb and ...
0 votes
2 answers
16k views

edit resolv.conf

I can't edit /etc/resolv.conf, error: permission denied I upgraded from 16.04 to 16.10 and keyboard & mouse stopped working, following ubuntu KB asks to mount chroot, chroot mounted but dns not ...
4 votes
2 answers
10k views

Provide an Xserver To Chroot

Description: I'm using a Lubuntu 13.10 X86-64 livecd to chroot into another Lubuntu 13.10 X86-64 located on my hard drive in a folder called chroot. I've had no trouble using the terminal to chroot ...
2 votes
1 answer
6k views

Chroot onto ARM based image

I'm trying to do some work on an image for a raspberry pi, but I don't have access to the pi itself, just the SD card that runs the OS. I'd like to chroot onto the pi's SD card (mainly to run some ...
0 votes
0 answers
346 views

apt update fails within proot

I'm building an image for an arm64 machine in a docker environment. I get the 20.04 base system by starting with debootstrap --components=main --arch=arm64 --foreign focal ./mnt http://ports.ubuntu....

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