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.

learn more… | top users | synonyms

2
votes
1answer
18 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 ...
0
votes
0answers
19 views

Synology jailkit debian cron debootstrap

I have a Synology NAS. For advanced using of my server, I installed a debian with chroot-jailkit and debootstrap. I follow those instructions (in french sorry) This is working really fine. I have ...
2
votes
2answers
46 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?
1
vote
0answers
271 views

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 ...
1
vote
0answers
40 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 ...
0
votes
0answers
43 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 ...
1
vote
0answers
47 views

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 ...
0
votes
0answers
123 views

Docker in Crouton - VFS consuming astronomical amounts of space

I'm attempting to help out a roommate who has installed Kubuntu on his Chromebook using Crouton (it's basically just a fancy chroot run within ChromeOS). I helped him get the Docker daemon running, ...
1
vote
3answers
825 views

error while loading shared libraries: libc.so.6: cannot open shared object file

I have a Linux kernel and I chroot it on /var/chroot: I added bash dependencies like so: ldd /bin/bash linux-vdso.so.1 => (0x00007fff9a373000) libtinfo.so.5 => ...
0
votes
0answers
88 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 ...
2
votes
1answer
76 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 ...
0
votes
0answers
91 views

restrict ssh access to /bin and using bash as a shell

I want to restrict my admin user to /bin directory while permitting to use bash as a shell via ssh. This is in my sshd_config file: Match User admin ChrootDirectory /bin X11Forwarding no ...
1
vote
2answers
52 views

Compiling a kernel for Gentoo with my module list from Xubuntu

A while ago, I started installing Gentoo on my Xubuntu box, using a chroot from Xubuntu, following these guides: https://wiki.gentoo.org/wiki/Handbook:AMD64 ...
2
votes
1answer
138 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 ...
2
votes
3answers
822 views

chroot permission denied! But Im root!

I am trying to chroot into an old HD to change a forgotten password, but chroot says permission denied? what gives? I am root! The harddrive I am trying to chroot into is an old version of edUbuntu ...
1
vote
1answer
60 views

Jail in chroot in debian 7.5 - Privileges Separation problem

I'm trying to create a jail for a user in my server. Let's call the user "juser". What do I want to achieve? I want an ssh user to be jailed in his home folder and not have any access (whatsoever) on ...
1
vote
0answers
37 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/ ...
1
vote
0answers
63 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 ...
1
vote
0answers
136 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: ...
1
vote
1answer
157 views

How do I properly bind directories inside chroot jails using fstab?

I'm running nginx, PHP-FPM and MySQL on Debian Wheezy. I've set up chroot jails (with debootstrap) for each individual virtual host in /srv/. Everything is working like one would expect, but after ...
1
vote
0answers
35 views

How to write in home user with chrooted sftp

I have a problem with chroot sftp an their home folder. I would like to write in user's home but I don't have proper permission for doing that. sshd_config Match User demo ChrootDirectory %h ...
2
votes
1answer
220 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 ...
1
vote
1answer
122 views

Can I use Apache web server in a chroot-ed environment on Gentoo? And how?

I just installed Apache for the first time on Gentoo. When I chroot into Gentoo from another OS (in this case Microknoppix) and try to start Apache (with /etc/init.d/apache2 start) I get the error ...
1
vote
0answers
23 views

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 ...
1
vote
1answer
947 views

Disable operations outside user's home directory with chroot jail?

I'm trying to restrict a user to a specific directory called gclegal using a chroot jail. I've uncommented the line in the /etc/vsftpd.conf file chroot_local_user=YES Created a new user called kg: ...
4
votes
2answers
199 views

How to prevent schroot from overridding passwd file and others files already present on the chrooted system?

When I had to repair my Debian system, I tried to use schroot due the convenience of not having to mount bind several partitions. But, contrary to my expectations, schroot decided to override my ...
3
votes
1answer
257 views

Error message: unknown user 'geoclue' in statoverride file

I obtained a strange error message inside a chroot: unknown user 'geoclue' in statoverride file when running apt-get install or apt-get upgrade. I use schroot to enter this chroot. I found that I ...
2
votes
1answer
749 views

Chroot gone wrong, can't ssh with user

Distribution: Scientific Linux 6.5 (Carbon), not exactly your typical brand of linux. Tried to chroot a user using these instructions for SSH and quite obviously failed, and now I can't even log in ...
2
votes
1answer
98 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 ...
1
vote
1answer
105 views

Can't losetup anything on armhf NAS

I'm pretty new to linux and chrooted my NAS with armhf architecture and tried looping device: losetup -f losetup: Could not find any loop device. Maybe this kernel does not know about the loop ...
1
vote
1answer
193 views

Using bash environment from an external OS partition

I have an external partition, /dev/sda, which contains an Ubuntu OS. The root is located in /dev/sda2. I would like to access commands from this OS partition. I have tried doing the following ...
0
votes
0answers
130 views

How do I get back into crouton on a Chromebook?

I installed crouton with the Unity interface like in this tutorial. I tried to install Gimp with the terminal after two months of use and it froze so I quit the terminal and went out of ...
5
votes
1answer
180 views

Real chroot on a systemd machine

I'm trying to get used to systemd, because it seems to be the way that Debian is going. I want to run Xorg in a chroot on hardware, rather than using networking (which seems to be the canonical way ...
2
votes
0answers
201 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 ...
1
vote
1answer
167 views

chroot for sftp user

I followed multiple guides on the internet on how to restrict a user so that he cannot change/see files outside of his home directory. So I created a user, let's call him john and I also created a ...
4
votes
1answer
105 views

Automate chroot into broken system

Every time you have to mount a system with a live-boot-CD and chroot into the system to repair grub, you have to type so many lines to mount into the right partition: fdisk -l find the right ...
1
vote
1answer
55 views

Deterministic method to find out whether some other process is in a chroot jail and where?

NOTE: I'm familiar with this U&L Q&A titled: How do I tell I'm running in a chroot? that sounds similar to what I'm asking, but there's a subtle difference to what I'm looking for. That ...
2
votes
2answers
601 views

How to use/test pivot_root?

I want to test the pivot_root command which moves the root file system of the current process to the directory put_old and makes new_root the new root file system. But I always get the following ...
0
votes
1answer
61 views

How can I convert a chroot into a GRUB2 bootable ISO image?

Say I have a chroot containing what will be a working Linux system, and some additional init scripts to mount an overlay filesystem (e.g. AUFS) over it. I've also generated a GRUB2 boot menu. What ...
0
votes
0answers
74 views

Where to create virtual link for chroot?

I've tried to pass this step of lfs but when i put: chroot "$LFS" /tools/bin/env -i I got: chroot: failed to run command '/tools/bin/env': No such file or directory So i search about it and ...
3
votes
1answer
205 views

chroot into a sshfs folder

I am trying to chroot into a sshfs-mounted directory: mkdir remoteroot sshfs remote:/ remoteroot/ sudo chroot remoteroot/ but I get chroot: cannot change root directory to remoteroot/: Permission ...
0
votes
0answers
53 views

Are system calls available in a chroot environment?

I'm experiencing a lot of compilation errors regarding missing system calls (e.g. error: '__NR_name_to_handle_at' undeclared (first use in this function)) with different projects (ganesha 2.1.0 ...
1
vote
1answer
140 views

Limit access on external drive mounted and used by sftp

I've got a unix user "popolo" who is chrooted in /srv/ftp/ and I mount my two external drives by /etc/fstab in /srv/ftp so I have /srv/stp/dude and /srv/ftp/sweet. Popolo has access to those drives ...
4
votes
2answers
188 views

Could you explain this “chroot” /tmp directory creation?

In the following linked article they explain how to create a "chroot" /tmp directory. I'm a bit confused by what they did. Could someone explain what the following commands are doing? Noexec and /tmp ...
2
votes
1answer
132 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 ...
0
votes
0answers
108 views

How to setup a scanner in crouton chroot?

I have ubuntu 12.04 installed on my hp chromebook using crouton but I'm not sure how to access a usb device from inside the chroot. I'm trying to access a brother DS-720D scanner with xsane. From ...
3
votes
2answers
159 views

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 ...
2
votes
1answer
608 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 ...
0
votes
1answer
72 views

ARM cross compilation package not found

I'm trying for arm cross compilation on my i386 machine using sysroot and chroot.I want to set environment variables like PKG_CONFIG_PATH to sysroot.Right now my code is not compiling because it is ...
2
votes
1answer
380 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 ...