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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420 views

Simulate chroot with unshare

I am trying to write a bootstrapper for a minimal, from-source linux distribution. I would like to build in a chroot-like environment. This should simplify packaging. I do not care about security at ...
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145 views

Creating a Safe Web Server

Web server hosts multiple websites. Multiple users update each website. User home directory /home/user1 /home/user2 Web directory /var/www/site1 /var/www/site2 Each user uses SFTP to upload ...
4
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1answer
2k views

How can I mount a directory of the host system for use inside a FreeBSD jail?

I am performing the following on FreeBSD 9.0-STABLE: mount_nullfs /foo /jail/foo After that, from within the host system, the mount works. So this works: touch /foo/bar && ls /jail/foo/bar ...
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1answer
274 views

Implement ProFTPd server without chroot

Can I use ProFTPd without using a chroot jail (thereby preventing access to anything outside of the FTP root)? I have a requirement to have symlinks in my FTP source that point to locations outside of ...
4
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2answers
4k views

How to unmount a formerly chroot'd filesystem?

I'm using a rescue-live-system (similar to a live-cd) to fix some issues with my Debian server, like that: # mkdir -p /mnt/rescue # mount /dev/md2 /mnt/rescue # mount --bind /dev /mnt/rescue/dev/ # ...
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1answer
276 views

SSH minimal rights user - su only [duplicate]

Possible Duplicate: Creating a UNIX account which only executes one command I am trying to setup a user account that only has as minimal rights as possible. The user should be able to log ...
2
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1answer
118 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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1answer
2k views

How to chroot into busybox environment?

i have a filesystem build with buildroot, to compile code for a device using a old kernel and uClibc. Now i want to chroot into the fs. The problem is, i dont have /bin/bash, just /bin/busybox. How ...
2
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1answer
753 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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2answers
3k views

getting 553 - cannot create file in vsftpd (ubuntu 12.04)

I'm trying to setup a ftp account for a user that has read/write access to one folder: /items/myuser I've set up the account with username 'myuser' in Linux with the adduser command. After that, I've ...
11
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1answer
4k views

How can I access a directory outside a chroot from within it?

I have a user which is chrooted to her home directory, but I want her to also be able to manage files within /var/www. As such, I did the following: root@server:/home/username# ln -s /var/www www ...
3
votes
1answer
10k views

How to restrict ssh users to browse only /home/%u contents

Can I confine my users to their /home/%u directory using only OpenSSH configuration? From instructions I found on the Internet, I stopped the SSH server and appended the following to the sshd_config ...
2
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2answers
764 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 ...
4
votes
2answers
574 views

How to rsync a chroot without breaking symlinks?

I'd like to rsync (backup) a chroot environment from outside the chroot. For that I first make a lvm snapshot of the chroot volume and then run rsync on that. The only problem with this approach: ...
2
votes
1answer
858 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). ...
2
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0answers
127 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 ...
2
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1answer
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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2answers
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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1answer
345 views

MBR is toast or at least Grub is

This started after some kernel trouble that I left alone for a while. I had miscompiled a kernel then tried to re-compile it and started to organize a list of boot options in grub for differently ...
2
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1answer
680 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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1answer
709 views

Start SSH session in some other directory than their home directory and lock them there

I've set up a SSH server which I've let some friends log into, both via SSH and FileZilla. I put a symbolic link to two hard drives in their home directories so that they could access some files. This ...
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4answers
12k views

How can I chroot into a filesystem with a different architechture?

I'm trying to chroot into a Arch Linux ARM filesystem from x86_64. I've seen that it's possible to do using static qemu by copying the binary into the chroot system: $ cp /usr/bin/qemu-arm ...
4
votes
1answer
341 views

Can you Chroot a program from an OpenVZ environment?

I just recently purchased a Virtual Private Server, and it is OpenVZ virtualization. I am setting up my LAMP stack, and in the past I have always just set up my BIND dns set up in a chrooted ...
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3answers
2k views

Boot Linux system from a subdirectory on a partition?

I would like to try to set up a computer so that it has multiple Linux installs all in the same filesystem. For example, the filesytem would have 3 folders: /Ubuntu_Precise, /Ubuntu_Oneiric, and ...
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1answer
2k views

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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1answer
944 views

When can one reboot from inside a chroot environment?

Sometimes when I chroot into some folder , I could use reboot to reset my box, but sometimes I can't. So I want to know why I could do that sometimes and why. UPDATE The chroot environment is ...
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2answers
5k views

Disable direct login for normal users (like oracle) in linux but allow scp and sftp?

Is it possible to disable direct login for normal users (like oracle) in linux but allow scp and sftp for that use?
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1answer
2k views

chroot fails with --userspec when chroot is i686

I'm experiencing a problem with chroot... I'm running on Arch Linux x86_64. I have a 64 bit chroot and a 32 bit chroot. They are identical except that one is 32 bit and one is 64 bit. I can enter ...
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5answers
2k 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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2answers
1k views

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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votes
1answer
373 views

Why is it possible to leave CHROOT with this sftp config?

I'm trying to create the user lenny, that has read and write permissions in the folder /home/lenny/ and has no shell but only access via SFTP. I'm doing the following: useradd lenny mkdir /home/lenny ...
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3answers
603 views

Unabled to get rid of BIND 9 chroot

I had installed bind-chroot from yum not long ago, and saw that there were errors in the daily logs from named. Under further investigation, I noticed a directory loop. The named files resided under ...
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3answers
901 views

Is there a drawback when using a chroot in high performance computing?

My (small) company uses an out-of-date linux (centos) software stack to run a proprietary software on a small cluster. Understandingly, IT is reluctant to upgrade since everything works now. I'd like ...
3
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0answers
604 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, ...
2
votes
1answer
640 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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votes
3answers
2k views

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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1answer
727 views

Any better alternative to chroot on an OpenVZ VPS?

Are there any better alternative to chroot environment? I'm thinking about running nginx on a jailed environment. BTW, I'm on OpenVZ VPS, so modifying the Kernel is a no-no. (I think that prevents ...
3
votes
1answer
300 views

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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4answers
3k views

Lightweight isolated linux environment

I want an isolated (guest) Linux environment on my computer that I can mess up without worrying about the host. E.g. install a lot of stuff from source without package management, pollute environment ...
2
votes
3answers
474 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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1answer
671 views

Allowing access to single folder in centos

I have a java application in /usr/local that keeps writing to a text file on a daily basis. I need a particular user to be able to read this file. What is the best way to do that? I have recently read ...
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1answer
480 views

Ubuntu 11.10 SFTP chroot jail problem

I am creating a SFTP server with Chroot Jail. The problem is user cannot log into the home directory. I need to keep ChrootDirectory value to one directory above the user's home directory ...
0
votes
1answer
406 views

Does OpenSSH_5.9p1 support Chrooted SSH?

Lately i upgraded my SSH server with OpenSSH_5.9p1 and tried to setup chrooted SFTP/SSH. So far i managed to setup chrooted access only for SFTP using new feature of openssh5.9p1: Match User ...
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vote
1answer
899 views

Is there an ARM repository for Arch Linux?

I'm trying to create a chroot for my rooted android phone. I want to do this with the arch_bootstrap.sh script found on the wiki but I can't find an ARM repository. My PC is x86_64 Arch Linux and my ...
2
votes
2answers
919 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 ...
2
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1answer
380 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
1k views

Chroot debian squeeze for shell access

A user requires shell access to an Ubuntu server from the WAN side. There are many shell accounts with simple passwords. So shell port (port 22) is blocked in the firewall. For my WAN side user I am ...
2
votes
1answer
365 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 ...
4
votes
1answer
6k views

Chrooted SFTP with full access to SSH stopped working (Debian)

I've got a home server on Debian 6 for backups. I'd like to setup chrooted SFTP environment with SSH access for some users (only for my knowledge, there are two users now). It almost works or rather ...
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votes
2answers
6k views

How do I tell I'm running in a chroot?

I have a unix installation that's supposed to be usable both as a chroot and as a standalone system. If it's running as a chroot, I don't want to run any service (cron, inetd, and so on), because they ...