On Sat, 10 Jun 2000, Ray Olszewski wrote:
> 1. First the basic one: what Linux are you running? Distribution, version,
> and kernel version.
Red Hat Linux release 6.1 (Cartman)
Kernel 2.2.12-20 on an i586
>
> 2. What is root's shell? Might it be something different from /bin/bash ?
No that's checked already it's /bin/bash
>
> 3. What shells are listed in /etc/shells? Might bash have been removed from
> it for some reason?
This is the reading from /etc/shells
/bin/bash
/bin/sh
/bin/tcsh
/bin/csh
/bin/ash
/bin/bsh
As you can see bash IS there!
>
> 4. Is /home part of the main filesystem or its own partition? If the second,
> what does df report about it? In any case, what are its ownership and
> permissions?
/home is part of the main partition
>
> 5. Same questions for /bin -- it won't be its own partition (it can't be,
> actually), but what are its ownership and permissions?
This is the reading ...
drwxr-xr-x 2 root root 4096 Jun 11 10:52 bin
I even tried giving it "777" permissions ... It didn't change anything.
>
> 6. Show us root's entry in /etc/passwd and the entry for a user who cannot
> login or be su'd to. (If your system doesn't use shadow passwords, feel free
> to replace the encrypted passwords, but don't change anything else.)
root:x:0:0:root:/root:/bin/bash
user:x:505:520::/home/user:/bin/bash
As I mentioned earlier ... none of the users except the root are able to
login .There's no nologin or .nologin file in the /etc directory either!
>
> 7. Show us the ownership and permissions for /bin/login and /bin/su
> themselves. For ordinary users, they need to be setuid (mode 4777, not 777)
> to work properly.
The entry of "ls -l login in /bin"
-rwsrwxrwx 1 root root 20132 Sep 9 1999 login
-rwsrwxrwx 1 root root 14124 Aug 18 1999 su
>
> 8. Finally ... are you quoting the error messages EXACTLY as you see them?
> The punctuation looks unusual in what you quote, which raises in my mind the
> concern that you are quoting inexactly or incompletely.
>
Well ,I think the below are the exact ones...
[root@sun /root]#su - user
su: warning: cannot change directory to /home/user: Permission denied
su: cannot run /bin/bash: Permission denied
[root@sun /root]#su user
su: cannot run /bin/bash: Permission denied
and /home/user exists and has appropriate permissions too!
The other message on login is the same . but I cannot give it here.
The screen immediately refreshes and logs out even the root!
>
> At 11:11 AM 6/11/00 +0400, V.Vasant wrote:
> >Hi,
> > Can you help me out ... Something so puzzlings come up in one
> >of the linux systems here that we can't seem to figure it out here .
> >
> > What has happened is that even as root we are unable to su to
> >another user account . It says "Cannot run /bin/bash permission denied"!.
> >which is the default shell. The root is only able to su to itself. We
> >thought perhaps someone has changed the root account. But that is not the
> >case either... We also gave "777" permissions to all files in /usr/bin
> >and /bin directories. Still the message persists .
> >
> > Moreover no user except the root is able to login . The system
> >simply says "No directory /home/<user> found " and the system closes the
> >login . Even the root is unable to use the login command to login as
> >another user. This with all users and home directories existing as
> >verified with linuxconf and userconf etc .. We also checked out the
> >/etc/profile and the /etc/bashrc files. Nothing seems to be suspicious .As
> >a last resort we gave all files from "777" permissions .The problem
> >remains unshaken !
> >
> > Now that I hope is a really good puzzle. Please help us!!
>
> ------------------------------------"Never tell me the odds!"---
> Ray Olszewski -- Han Solo
> Palo Alto, CA [EMAIL PROTECTED]
> ----------------------------------------------------------------
>
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