Solved: I messed up something

[INFinit]

I typed in my console: chsh [I was a root] and then I logged out. I logged back in and when I typed su RET Password it said: "Not a Shell" . I've tried so many things - but the file /etc/passwd is messed up and the root is: ksh [it must be /bin/bash[
I've tried also several programs to read the file system under windows - but they have no write privileges. Can you tell me how can I solve my problem - I think I must change the file permissions.

[bidi]

There's a file somewhere that specifies what the user's shell is. I think the file is /etc/shells. You'll need to be root to change it, so that might be a problem for you, but if you have sudo privilages use that.

[INFinit]

I know the file: it is called: /etc/passwd
I don't have such privileges!

[DoctorDan]

nope... i believe its actually /home/username/.profile or /home/username/.bashrc

could be wrong tho...

[INFinit]

Whatever it is - I must have root privileges to change this file...but I don't have because it says: Not A Shell and this is the problem!

[bidi]

I never said you had to do it in your current distro. Just boot into any old rescue distro (if you have a floppy drive, I recommend tomsrtbt), mount the partition where the file is to be found, and change it manually.

[INFinit]

OK 10x a lot - it worked - I've changed the attributes with: chmod and then I changed the text!