Hi, You need to create the /dev/null device in each user's home directory... e.g.: mknod /dev/null c 2 2 The sftp server requires access to /dev/null starting in more recent releases, and the chroot_safe script does not provide it that access. Hope this helps! -Adam On 12/3/06, Martin Nordin <martin.nordin@gmail.com> wrote:

If I do a su <sftp user> I get this error:

Cannot execute /usr/lib/ssh/sftp-server-chroot: Exec format error

I'm not sure what privileges should be set on the chroot script, at the moment it is like this: # ls -l /usr/lib/ssh/ -rwxrwxrwx 1 root root 216 Dec 3 20:31 sftp-server-chroot

Regards, Martin

On 12/3/06, Martin Nordin < martin.nordin@gmail.com> wrote:

...

Hello.

I've tried to follow the sftp + chroot_safe tutorial on the crux page but

I can't get it to work.

...

I can sftp/ssh to my machine as my usual user so I think the basic

ssh/sftp setup is ok.

...

I've followed the tutorial in minute detail but when I attempt to sftp as

the sftp-user the connection is cut immediately without error messages.

...

I've added my usual user to the /etc/sudoers exactly like the sftp usr and

...

Couldn't open /dev/null: No such file or directory

If I do a strace /usr/lib/ssh/sftp-server I can see that the sftp-server

when I run sudo /usr/lib/ssh/sftp-server-chroot I get this output: prg performs an open(/dev/null) but when I have chrooted to the sftp usr home dir the /dev/null is not there, of course.

...

Does anyone of you have any idea of what I'm doing wrong or how I can get

this to work?

...

Thanks, Martin

Hi Martin

Maybe someone with an account on crux.nu could update the script with #!/bin/sh and add a note about the /dev/null creation for the benefit of future dummies like myself.

Done! But, if you want write down your own experiences, please check the password-free public wiki at: http://crux.nu/Public/ Falk -- [root@Linux] chown linux.users /world