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Questions tagged [chroot]

A chroot on Unix operating systems is an operation that changes the apparent root directory for the current running process and its children. A program that is run in such a modified environment cannot name (and therefore normally not access) files outside the designated directory tree.

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Sound output not working properly in chroot

So I have a 64-bit Linux Mint 17 system and I am trying to set up a chroot environment with a 64-bit Ubuntu 12.04-based system (actually something called Vinux, an Ubuntu remix). The problem is that ...
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How do I run chromium inside a chroot?

Okay, I can run Iceweasel 17 ESR fine and some simple X apps like xkill, so I know that it's not merely an X display problem. However any version of Chromium and Iceweasel 24 fail with the following ...
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How to make unshare(CLONE_NEWUSER) succeed after chroot?

My call to unshare(CLONE_NEWUSER) when called as a non-root user returns EPERM because of this (http://man7.org/linux/man-pages/man2/unshare.2.html): EPERM (since Linux 3.9) ...
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How to escape from a hardened chroot on Linux when only file capabilities are available to the attacker?

There is a chroot environment in /var/myroot, and an attacker has obtained arbitrary machine code execution in a process running as root (EUID 0) in the chroot. But the processes under control of the ...
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247 views

Is it possible to set up a lxc or docker container for a X application?

I need to use the Cisco packet tracer for college(I use Debian testing). Now I actually like that application, except it has one annoyance... it needs an ancient libssl version to run. What is even ...
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2k views

Reboot inside rescue mode chroot

I had a problem booting my computer, so I ran a Live cd and booted it into rescue mode, started SSH and went back home, then I fixed the boot error remotely, and now I want to restart my server so ...
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VirtualBox keeps on giving me errors!

So I installed VirtualBox and used this guide After I followed this at the end I got some errors (xenial)cloud@localhost:~$ virtualbox WARNING: The vboxdrv kernel module is not loaded. ...
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chroot and hyperos on ArchLinux?

hyperos is a fork of tinycorelinux Can I run hyperos in a chroot? How can I create an ISO image from files on repo? Is this possible? Which steps should I follow?
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730 views

How to use chroot'd desktop environment on Android with external display, mouse and keyboard?

I have a chroot'd Arch Linux environment set up on my Android phone (a OnePlus One) and I would like to connect it to a monitor (directly or with use of some sort of passthrough/adapter eg. Raspberry ...
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Running (X) Xfce4 in Debian chroot

I was trying to start Xfce4 in a chroot. The problem is that Xfce4 starts, shows default the UI but the USB keyboard and mouse are not working. My chroot script: #!/bin/bash mount --bind /dev /srv/...
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remount chrooted read-only subdirectory (non-mountpoint) to read-write from within jail?

I'm trying to do the same of this question (multiple linux installation on same filesystem) but I get this result (root filesystem mounted as read-only) . I'm using debian/sid, have successfully ...
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262 views

How to find current chroot jail path on Linux <2.6.26

While running kernel 2.6.26 or newer it's possible to get the path of the current chroot jail by comparing the mountinfo of the current process and the init process. Is there a way to get the same ...
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800 views

Slow system after running a KDE GUI application from a Debian Squeeze chroot

I have a PC with Ubuntu 11.04 and a Debian Squeeze chroot installed in it. As soon as I start any KDE application from within chroot (and installed there), e.g. Kompare for viewing git diff output, ...
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name resolves doesn't work in chroot for users, but does for root

I've booted a live-cd in order to download, compile and install a few packages on a otherwise working system without actually booting said system. I've created a build user on the system by issuing ...
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427 views

While compiling 32 bit binary on 64 bit Linux (ubuntu 14.04) getting wrong ELF class error “wrong ELF class: ELFCLASS64”

I have 64 bit Ubuntu 16.04 installed on my system. For some reasons i have to change root directory to a directory which is nothing but a replica of a different system with the required libraries ...
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675 views

How to run docker inside chroot

I have debian stretch installed in arm64 android phone in chrooted environment. I have installed docker-ce following these steps from here. On starting docker :: systemctl start docker returns this ...
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99 views

chroot of entire filesystem, except for one file

I want to create a chroot for a command that I'll run, and I want the chroot to be completely identical to the "real" filesystem, except for one altered file. (Let's just assume that this is indeed ...
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138 views

Installing udisks2 ejects sdcard

When installing udisks2 package on debian stable (using apt), at the "setting up" step, the sdcard gets ejected. The problem is, the process is running from the sdcard (chroot environment). I get ...
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145 views

Passwordless SSH access not working with rejected message

I setup SSH passwordless access between two Linux hosts. But passwordless access is not working. Authentication is cancelled with a rejected message as shown below su - wsync -bash-4.1$ ssh node-...
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410 views

How to 'snapshot' a chroot?

I want to perform something similar to a 'clone' on vmware fusion/virtualbox/a VM manager. Host and chroot are both ubuntu. One complicating factor may be that this chroot may have one or more child ...
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752 views

running cron on a chroot

For my web development I use a debootstrap'ped Debian with sysvinit, I start apache2/mysql manually only when I need to work. Now for a new project I require to run some scheduled task for which I ...
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549 views

How can schroot works with aufs

I'm using schroot with aufs. Currently, my conf file under \etc\schroot\chroot.d looks like [trusty_chrome] description=Ubuntu 14.04 Trusty running Chrome and Adobe Flash directory=/srv/chroot/...
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598 views

User Acces restrict to only one folder

I am trying to establsih SFTP User rights at a server to only one folder, following the guidelines here: http://www.esotech.org/resources/software/linux/creating-an-sftp-unix-group-with-chroot-...
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75 views

No user exists for uid 721001106 when running ssh command within SSH chroot directory

I am running debian 8 with SSSD authentication. The authentication works and ssh works fine. I have copied all libraries etc over to my SSH chrootdirectory and all my applications work except ssh ...
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sshd_config - StrictModes option - bad to disable?

My use case is to have a shared account for webmasters (named as domain) but only one of the webmasters is "owner" of main data and defines who can loging to the shared account via editing ...
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408 views

How Do I Access Network Proxy From Chroot?

I have set up apt-cacher-ng on my laptop cat /etc/apt/apt.conf.d/02proxy Acquire::http { Proxy "http://localhost:3142"; }; I can install a package, turn off the internet, remove the package and ...
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2k views

nginx won't start: getpwnam(“nginx”) failed in /etc/nginx/nginx.conf:5

I am running a chrooted nginx server on CentOS 7. When I try to start nginx, I receive this error: getpwnam("nginx") failed in /etc/nginx/nginx.conf:5. I have already copied the required libraries, ...
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59 views

Making root being bind mounted

I have XUbuntu and Arch on a laptop, I'm sharing /boot partition between these distros mounting it on /mnt/boot and bind-mounting /mnt/boot/xubuntu or /mnt/boot/arch onto /boot; it works fine even ...
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517 views

Why is chroot needed while installing GRUB?

I am trying to dual boot my laptop with linux alongside windows. Now one of the things I will probably need to do is that first install linux to my desired partition and then boot from a live cd and ...
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sshd_selinux_copy_context: getcon failed with No such file or directory (SFTP from Windows to a chrooted account)

A colleage is attempting to sftp into a RHEL7 server from Windows using an SFTP client and SSH passwordless login. The user account is chrooted at the server. openssh version 6.6.1 is installed on ...
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248 views

setting up sftp users only second instances of sshd

I created second instances of sshd called sshd-sftponly and using different port (e.g 2222 ) and made all necessary changes in /etc/rc.d/init.d/sshd-sftponly and /etc/ssh/sshd_config-sftponly ...
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170 views

American Fuzzy Lop run test program as unprivileged user or in chroot

I'm attempting to test tcsh on OS X with American Fuzzy Lop as an exercise, but don't want to accidentally clobber any useful files on my system. Knowing essentially nothing about fuzz testing, I did ...
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567 views

Python installation fails in chroot

I tried to install Miniconda Python in a chroot: chroot $1 wget -q https://repo.continuum.io/miniconda/Miniconda3-3.19.0-Linux-x86_64.sh -O /tmp/miniconda.sh ...
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131 views

Build errors on a copied operating system in a chroot

I'm in a bit of an interesting situation. In an attempt to have root access on my school's physics network computers, I ended up creating a chroot environment, using fakeroot and fakechroot. As every ...
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Trigger a GTK application from CHROOT during LightDM startup

I am trying run a GTK application with chrooted environment. Mentioned are the lightdm settings which I have set. System configuration: OS : Debian 8 chroot FS: Debian 6 Windows manager : LXDE ...
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unix chroot jail shell (with or without sudo?)

at the moment I am creating a chroot jail. Therefore I read some articles and everything seems to be clear, exept for one thing: the chroot jail shell In one source they created the following setup ...
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139 views

How does a chroot system interact with the kernel

I am trying to debug an OpenGL issue in a piece of closed source software. The software supposedly works in Debian Wheezy and I would like to get it working in Arch. I tried running it in a Debian ...
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43 views

Is it secure to mount with defaults my /chroot partition?

I run debian with GRSECURITY patched kernel. Apache is chrooted with mod_chroot under /chroot For now I have mounted /chroot partition with defaults,nodev. However, Apache need to access /dev/...
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183 views

Debian ARM on chroot Mumble server error

I use Debian running in a chroot next Android. $ uname -a Linux localhost 3.0.64-CM-g7e7a10d #5 SMP PREEMPT Wed Apr 8 17:34:47 BRT 2015 armv7l GNU/Linux I installed mumble server apt-get install ...
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106 views

Why does grub2-install escape chroot jail?

I have an odd experience. Scenario: I am writing a Linux installer (based on OpenSUSE 12.2) that runs in an initrd (actually initramfs), and I'm trying to update the bootloader. A copy of the ...
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No screens found error when starting fresh install of chroot debian wheezy with xfce gui

I am not an experienced Linux user, but have bought a chromebook and am now installing crouton. This is the very first thing I did with the Chromebook, so I don't think I need a powerwash. First I ...
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389 views

Setting up basic chroot environment from a fedora ISO image in Ubuntu

From a tutorial in https://help.ubuntu.com/community/DebootstrapChroot at TLDR section i was able to set up a chroot environment for 32 bit Ubuntu ISO image under 64 bit Ubuntu. Now i need to do the ...
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336 views

Android chroot Debian

I have a armv7l embedded device with 3 usb ports and a sd card slot. The OS of the device is android with a Debian OS in chroot. Via the Debian I can ssh into the device and breakout the chroot to ...
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Linux: how to run a program with rw access to only a folder

How can I execute a program in a way that all the system is RO and only some folders are RW? Eg: steam (:P) roexec --rw ~/.steam steam Is there any tool that allows me to do this? I've tried mount -...
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796 views

Is there a “supported” way in RHEL/CentOS 7 to union-mount a directory tree on top of an NFS mount point?

I have an NFS share containing almost 500 chrooted (s)ftp user's home directories. This NFS share is mounted on several FTP servers forming a highly available FTP cluster. I would like to enable ...
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212 views

Debootstrap for Backbox Error with release file

I'm trying to install a BackBox (Ubuntu based) chroot environment with debootstrap using the following command: sudo debootstrap --variant=buildd --arch i386 trusty /MYJAIL/ http://ppa.launchpad.net/...
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Chrooting any arbitrary program using dynamic linker?

One of the problems using chroots is getting all the binaries and libraries installed. It just occurred to me that there might be another way. The TSocks project uses a technique they call "shared ...
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735 views

How to send a running process to jail?

"Go directly to jail; do not pass go, do not collect $200" — Monopoly Is there any way to make a running process's all future file access behave as if it has always been in a chroot environment?
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22 views

How to run 2000 processes with chroot

I have a program that needs to be run in about 1000 instances, each in a different independent directory (/mnt/x_1, /mnt/x_2... /mnt/x_1000). What I'm currently doing is mounting /bin /dev and /etc in ...
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Logging Chrooted Users SFTP Activity

So I'm having the issue where I can't seem to log users SFTP activity. I can see when a new session was created by a specific user, but can't see where they've been or what they may have dropped ...