Unix and Linux Stack Exchange
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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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chroot "jail" - what is it and how do I use it?

I have heard/read a lot about the chroot jail under linux but have never yet used it (I use Fedora day-to-day), so what is a chroot "jail"? When and why might I use it/not use it and is there anything else I should know? How would I go about…
user119
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chroot: failed to run command ‘/bin/bash’: No such file or directory

When I run the chroot command an error is given: failed to run command ‘/bin/bash’: No such file or directory
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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 would conflict with the host system or be…
Gilles 'SO- stop being evil'
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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 archarm-chroot/usr/bin But despite this I always get…
Jivings
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How to create a FTP user with specific /dir/ access only on a Centos / linux installation

So I'm on a VPS - CentOS Linux installation. I have vsFTPd on the server. I currently have SFTP access to the server via my root user, but am now trying to create a new user with FTP access to a specific directory only on the server, I've done the…
user1231561
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Limit FTP access only to the /var/www with vsftpd

I am running vsftpd as ftp server on my linux (rasbian), I log in to the machine as a root user. I would like to be still locked to using only /var/www, how can I configure vsftpd conf to accomplish it?
Badr Hari
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Restricting an SSH/SCP/SFTP user to a directory

Is there a simple way to restrict an SCP/SFTP user to a directory? All methods that I've come across require me to set a chroot jail up by copying binaries, but I don't think that should be necessary.
user4518
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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 root@server:/home/username# cd…
Doc
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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/ # mount --bind /proc /mnt/rescue/proc/ # mount --bind…
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How to perform chroot with Linux namespaces?

After reading about Linux namespaces I was under the impression that they are, amongst a lot of other features, an alternative to chroot. For example, in this article: Other uses [of namespaces] include [...] chroot()-style isolation of a process…
koalo
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What to use to harden Linux box? Apparmor, SELinux, grsecurity, SMACK, chroot?

I am planning to go back to Linux as a Desktop machine. I would like to make it more secure. And try a few hardening techniques, especially since I plan to get my own server. What would be a good, sane hardening strategy? Which tools should I use -…
jottr
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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 environment variables etc., then spawn another…
math4tots
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Boot into a chroot?

I have Linux (Debian Jessie) installed on a hard drive. Drive - sda1, ext4fs, and sda2 - swap I have a /chroot folder. There is installed another system, in /chroot folder. Question: How to tell the bootmanager, to boot not the primary system (main,…
skrepki
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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 this point. The bootstrapper should not require…
Rooties
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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 error: pivot_root: failed to change root from .'…
vvilp
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