chroot on redhat 9.0

secret_ident · 01-05-2004, 09:24 PM

when I created it, I get a bash file in there, no folder.
so I get these errors

[root@localhost oxide]# chroot /home/shell/oxide /bin/bash --login
chroot: /bin/bash: No such file or directory

so I add a bash folder and I still get an error
[root@localhost oxide]# chroot /home/shell/oxide /bin/bash --login
chroot: /bin/bash: Permission denied

why is this?
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\//////////////////////////////////////////
what I'm wanting to do is:
have the folder "oxide" as a root folder for the shell user "oxide" and so he can only access files/folders in his directory only. and I'd want to set that on each account I setup, is that possible?

n1wil · 01-14-2004, 12:27 PM

I am trying to accomplish the same thing. Want to keep a user ONLY in their Home Dir.

anyone have any answers to this one? I am new to Linux. I tried to read the help that came with chroot, but didn't understand it. Could someone please give a syntax example is the following conditions are true:

home dir is: /home/johndoe

User ID is: johndoe

I only want "johndoe" to be able to navigate/see files in his own home dir only.

Any help is MUCH appreciated! thanks!

Capt_Caveman · 01-14-2004, 10:54 PM

I think you guys might be interested in setting up a chroot jail for users, which is a variation of simply chrooting an application but isn't quite the same thing. It's a bit more complex than just chrooting bash to the users home dir. There is an entire section of the Security references thread here that is entirely devoted to chrooting and setting up chroot jails. There are several comprehensive walk-throughs and even entire project devoted to the task (Jail Chroot Project) that offers a suite of tools which do alot of the work for you.

secret_ident · 01-17-2004, 05:13 PM

I used the "jail_1.9 " of one of the links you gave us, I followed exactly what it said to do, but I get this error:

[root@localhost src]# make
gcc -Wall -g -D__LINUX__ -DDEBUG=0 -I . -c generic_helpers.c -o generic_helpers.o
make: gcc: Command not found
make: *** [generic_helpers.o] Error 127

Capt_Caveman · 01-17-2004, 05:54 PM

make: gcc: Command not found
Do you have GCC (Gnu C Compiler) installed? If you're not sure do:

rpm -qa | grep gcc

If it's not installed, you should be able to find it on one of the Redhat 9.0 installation CDs.

secret_ident · 01-17-2004, 06:00 PM

[root@localhost src]# rpm -qa | grep gcc
compat-gcc-7.3-2.96.118
libgcc-3.2.2-5
compat-gcc-c++-7.3-2.96.118

I take is as I have it installed

secret_ident · 01-17-2004, 06:32 PM

I renamed the files from .c to .h except for jail.c and now I get this error:

[root@localhost src]# make
gcc -Wall -g -D__LINUX__ -DDEBUG=0 -I . jail.c -o jail generic_helpers.h passwd_helpers.h terminal_helpers.h && \
cp jail ../bin
/bin/sh: line 1: gcc: command not found
make: *** [jail] Error 127

have any simpler ideas to keep someone in their some directory?

Capt_Caveman · 01-17-2004, 07:28 PM

Looks like you have everything installed except the c compiler itself. If you had it installed you should have gotten:
compat-gcc-7.3-2.96.118
libgcc-3.2.2-5
compat-gcc-c++-7.3-2.96.118
..and...
gcc-3.2.2-5

Or something similar. (gcc-3.2.xxx)

Install the gcc-3.2.-xxx.rpm off the install disks and re-login. Then make should be able to find gcc. Also I wouldn't change those filenames unless indicated in the HOWTO.

---EDIT----

You should be able to test if gcc is installed by simply doing:

Code:

$ gcc
gcc: no input files

if it isn't installed you should get:
$ gcc
bash: gcc: command not found