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.
Questions tagged [chroot]
591 questions
154
votes
5 answers
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
61
votes
5 answers
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'
- 829,060
15
votes
1 answer
Why do I need to use chroot
This question chroot-jail-what-is-it-and-how-do-i-use-it refers to what is and how to use chroot.
What I don't understand is why do I need to use chroot. I understand what it does, but I can't think of a case when I need to use it, given the fact…
2
votes
3 answers
Changing the hostname in a chroot environment also changes the hostname outside
I chrooted into my testsystem with
mount /dev/vg0/vm01.buster-test-disk /media/vm01.buster-test-disk/
mount -t proc none /media/vm01.buster-test-disk/proc
mount --bind /dev /media/vm01.buster-test-disk/dev
mount -t sysfs sysfs…
rubo77
- 28,966
2
votes
2 answers
How to properly unmount mounted directories after doing chroot?
Usually, I mount some directories to chroot environtment like this:
mount -t proc /proc /mnt/chroot/proc
mount --rbind /dev /mnt/chroot/dev
mount --rbind /sys /mnt/chroot/sys
mount --rbind /run /mnt/chroot/run
But, after finished, I can't umount…
Mas Bagol
- 605
1
vote
0 answers
need a help for change the root chroot /mnt/sysimage in rescue mode
my grub file corrupted and entered to rescue mode. after at shell prompt, unable to change chroot /mnt/sysimage.
I tried to ln -s /bin/bash /mnt/sysimage/bin/sh but not changed, copies some libraries from /lib64 to root..still getting an error…
Sreekanth7
- 11
1
vote
1 answer
Different fakechroot behavior on Fedora and Ubuntu
Consider the following directory tree (mychroot):
mychroot/
├── proc
│ └── cpuinfo
└── usr
└── bin
└── ls
On Fedora 20:
$ fakechroot chroot ./mychroot/ /usr/bin/ls proc
cpuinfo
Version:
$ fakechroot --version
fakechroot version…
Amit
- 412
0
votes
1 answer
How can one compromise system integrity or availability from chroot jail?
As part of university assignment I'm researching the ways an attacker can bypass chroot jail. Naturally, I've seen that there are plenty of ways to attempt privilege escalation using vulnerable setuid executables, dirty cow, and other exploits which…
Nikolai Savulkin
- 103
- 2
0
votes
1 answer
chroot command: failed to run command ‘node’: No such file or directory
I run this command at the command line:
$ sudo chroot . node test/simple.js
And I get this error:
chroot: failed to run command ‘node’: No such file or directory
makes sense, since the node executable is located in a file below the PWD. So what…
Alexander Mills
- 10,002
0
votes
1 answer
Why am I getting kicked out of my chroot?
I enter a chroot, source a script to initialize my git user (source init_my_chroot) and then seem to be too sensitive to getting kicked out of my chroot.
install: cannot create regular file ‘/path/to/testfile’: No such file or directory
make: ***…
tarabyte
- 4,296