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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Backing up chroots for host reinstall

I've had my workstation for a couple of years now and its slowly become a complex beast, taking on many roles for my dev and test work. I have done some research and was thinking of setting up some ...
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405 views

Are there any differences between mounting a /proc filesystem inside a chroot compared to mounting it from the outside?

Compare the following: mount -t proc none ./my_chroot/proc and: chroot ./mychroot mount -t proc none /proc
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How can I force chrooted programs to use a virtual ethernet device?

First off, this is not for security reasons, or for use in a production environment. It's because I want to mess around with different configuration management systems on relatively low-spec ...
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238 views

Backtrace of “git clone” running inside qemu-user-emulation based arm-chroot

I'm running a wheezy:armhf chroot using qemu user emulation on my jessie:x86_64 system. Somehow, a git clone on a particular private repository will hang inside the chroot, while succeed natively. ...
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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 ...
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775 views

suexec with chrooted environment

I'm trying to get a chrooted Apache environment working running mod_fcgid with suexec. Looking at suexec log inside jail, the wrapper scripts are being executed with no problems, however, when I look ...
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636 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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185 views

Denying “/opt/” access for SFTP Users other than particular dir

This is my first (newbie) post here in unix stackexchange. I want to use my WebServer (Debian) as SFTPServer giving access to particular employees. The dir structure is as follows under root: ...
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2answers
506 views

How do I `umount` /proc?

I am following this tutorial on how to do a firmware update to my NAND flash. I followed it only changing the directory where I am placing my new root. I am copying all of the /bin /dev /sbin /usr ...
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5answers
3k views

How to completely hide stuff from a user?

I want to let some of my friends access my computer by making them user accounts. They will mostly access my computer by sftp and ssh, but they could also sometimes access it at my home. However I ...
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1answer
121 views

Is it possible to log directly into chroot?

Lets say I boot up my computer and I see the login screen. When I log in as myuser, I want to be restricted to a certain root directory via. chroot. Let's assume that the directory is ...
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How to achieve the effect of chroot in userspace in Linux (without being root)?

The goal is to install and run programs in a displaced (relocated) distro (whose / must not coincide with the global /) inside a host Linux system. The programs are not adapted for using a different / ...
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2k views

How to run Firefox in a chroot jail?

I've got this chroot jail all setup. I try to run Firefox in it, and get the message: "Gtk-WARNING ** cannot open display: " I know I have to invoke Firefox with --display= something. I probably ...
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259 views

where does Cron look for the default mail binary?

I have setup Cron Jobs to run inside a Chroot Environment, depending on the User/Group; I have noticed that these cron jobs, running inside the chroot environment, fail to send any mail. Log files ...
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184 views

SFTP chroot jail/access based on wildcard

I want to give a list of people SFTP access to /webdocs/ABC* where they will read-write access to only directories that match this wildcard. How do I do this? Can I create a chroot jaill or some ...
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964 views

Sudo does not work in chroot

I would like to be able to use the sudo command in a chroot environment. I start the chroot as follows: chroot /debian-squeeze /bin/bash Now I'm logged in as root in the chroot. I can do su user ...
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1answer
919 views

SFTP: give user access to folder outside home

I have a machine running Ubuntu 12.04 LTS with OpenSSH server installed. I have created a user with a jailed home account. When I log in with the user's account, I can only access his home (duh). ...
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OpenSSH, chroot user: Root needs to own the user directory, is there any consequence?

I want to create an account for my friend on my computer, but I don't want my friend to be able to view all my files. I saw that with OpenSSH, there is an option for that. Inside the SSHD ...
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Display X applications on an Android system

Host system: Android 3.2.1 Honeycomb Chroot system: Debian Testing lxde Hardware: Asus eee pad transformer tablet nvidia arm architecture Note 1: The Debian system boots on this hardware, thus it ...
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1k views

Mount points in a chroot

I have some device (say /dev/sda1) mounted at /home/user1. I also have a full Linux system under /tmp/chroot, and the directory /tmp/chroot/home contains only one directory named user2. If I chroot ...
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1answer
82 views

What folders need to be mounted before chroot?

I am attempting to update a broken Linux Mint 32 bit installation using chroot from a live cd. Different websites give different folders that need to be mounted before chroot. The error I am trying ...
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1answer
764 views

Why does chroot get ENOENT on an existing file?

;TL-DR - Answer: because the dynamic linker ld-linux-x86-64.so.2 was missing. I have mounted a squashfs (shouldn't matter) filesystem -ro,loop at /mnt/foo. It contains among other things the ...
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112 views

Unable to connect after ChrootDirectory within sshd_config

After adding the following to my sshd_config file... Match user myuser ChrootDirectory /var/www/html X11Forwarding no AllowTcpForwarding no ForceCommand internal-sftp I am unable to ...
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988 views

Pivot root between two Linux installations

I have two Linux distributions installed (Debian and Ubuntu). Each with its own usr, swap, and whatever. Both are completely independent, each in its partition. According to the man pages, I could ...
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HowTo Chroot to BSD

I recently tried FreeBSD [9.2]. I installed it but as i found out it doesn't install any bootloader by default. So now i want to find out HOW it is possible to chroot to the installed BSD via a ...
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How to properly use Gentoo Linux as a supplement to an existing distribution?

While I originally wanted to entirely replace the Linux distribution my NAS uses, I meanwhile came to the conclusion that it would be better to leave the existing system as unmodified as possible and ...
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507 views

Servers running from chrooted Ubuntu on HP TouchPad? [closed]

The problem: servers appear to be broken inside my Ubuntu chroot. No matter what kind of server I try to run, they all seem unresponsive (VLC server won't respond to client, mkRemote doesn't move the ...
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66 views

Chroot user exit jail [duplicate]

I am using OpenSSH chrootdirectory feature to give access to a user via ssh. Can this user exit the jail and return to the normal OS environment? Maybe with su?
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125 views

Define custom login shell in schroot

According to the schroot man page: schroot allows the user to run a command or a login shell in a chroot environment. If no command is specified, a login shell will be started in the user's ...
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154 views

How does chroot's use of qemu for cross compile environments work?

To be able to do cross compiling there's a trick where you copy a static qemu binary into your <different-arch-root-to-be>/usr/bin and when you chroot into that filesystem, which has non-native ...
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1answer
410 views

How to build gcc inside a Debian chroot?

I used debootstrap to set up a minimal Debian system (x86): debootstrap wheezy /var/chroot http://ftp.debian.org/debian/ Then I entered the chroot and installed some packages: apt-get install ...
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399 views

vsftpd does not allow chrooted users write to directory

I installed vsftpd on ubuntu 12.04 and chrooted local users, in order not to let them see the other parts of system. but when a local user wants to login into ftp it gives out this error: 500 OOPS: ...
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How to have a chroot system mount shared with its host?

Say I chrooted into ~/myroot with its /mnt being bind-mounted from the host's /mnt. Now (from within the chroot environment) I want to e.g. mount /dev/something /mnt/something such that not only the ...
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How to assign an additional IP/hostname to a chrooted environment?

While I can simply have e.g. sshd in a chroot environment ("chrootenv") listen to a different port than its parent ("parentenv"), it would be more convenient to have that environment have an ...
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1answer
611 views

Debian chroot blocking PTTYs on host

I've created a Debian-based chroot environment using debootstrap under Arch Linux, and fill it with life like this: #!/bin/sh mount -t proc proc $CHROOT/proc mount -t devpts devpts $CHROOT/dev/pts ...
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848 views

Chroot Risks w/ /dev and /proc

I am planning to set up a few chroot jails for some users to run/test Java applications (lets just assume each application is untrusted). Is there any risk involved with mounting /dev and /proc into ...
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1k views

GParted LiveCD: Is there a version with a 64-bit kernel?

I'm trying to chroot with the GParted LiveCD onto an existing 64-bit system, attempting to fix grub.
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794 views

Building GCC inside a chroot from source

In a previous question I asked about creating a chroot that simulates my embedded device environment. It was suggested that I build from source GCC and binutils first inside my chroot. To attempt this ...
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Is it possible to make a chroot -bind with debian under mac os x lion?

Within Linux (e.g. Ubuntu), it is possible to mount partitions like /home, /etc, /lib from another Linux machine and bind them to /proc /sys /tmp to the host's to actually take control of the mounted ...
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679 views

Preventing ChromeOS from blanking the screen when working on a different tty

I am running Archlinux in a chroot alongside Chrome OS on a chromebook. The original project is there, my fork of it is here (mostly similar). The issue is that the display power management of Chrome ...
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1answer
402 views

Debian unstable chroot security issues

This page describes how you can use the debootstrap utility to install a base Debian unstable/sid system on an existing Linux machine. The new install is accessible using chroot. When doing this, ...
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1answer
443 views

How to add another domain to my chrooted named server

Firstly I successfully have a domain working in a chroot named. There are files in /var/named/chroot/var/named called mydomain.com.db and named.local and named.root. Also in /var/named/chroot/etc ...
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261 views

Permission denied in scripted chroot jail

I am attempting to script the creation of a chroot jail (I know that there are tools for this, but I am in it for the experience, so please don't recommend a tool). I have a script which looks up ...
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1answer
488 views

How to copy a debootstrap (chroot) directory to another computer?

I created an installation of Debian in a subdirectory using debootstrap on computer A. Now I would like to transfer this installation to computer B which has a local connection but no global internet ...
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1answer
47 views

Does `build_packages` download all libraries again in the case of a failed build?

I have been trying to set up and build an image of the Chromium OS from the instructions available here. My laptop was running the build_packages script for about 7-8 hours after which it failed on ...
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792 views

Share a directory over FTP with chroot_local enabled

I'm using vsftpd. By default, when I create a user, they are jailed in their directory which is /home/user. I have enabled chroot_local_user=YES. On the other hand, I also wanted to create a shared ...
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696 views

Cannot open GUI after ssh -X and chroot

I ssh ( with -X option ) to another computer then I I do a chroot. I then encounter problems running X11 apps. As one example, after the ssh I would run emacs and it would open a new window as a X11 ...
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29 views

upgrade chroot version on centOS 5?

How do I upgrade chroot release on my centos 5 server? I want to install a service that uses a new capability available in later versions (--userspec) of chroot and I can't find any documentation of ...
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47 views

Making Ubuntu programs available to fedora through “chroot”

I have Fedora and Ubuntu installed on different partitions on my system. Now i want to make programs such as "adobe reader" or "kerio-control-vpnclient-8.4.2-2869-linux" available to fedora. those ...
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186 views

chroot with unionfs-fuse, can't access /dev/*

I have created the a chroot jail in combination with unionfs-fuse so that I don't need to install another system inside it. However, the resulting system's /dev entries are not readable.This is ...