I am new to this..so please help and forgive at the same time

1. the su command now fails to work, i get the following:
machine:/home/user1/Maildir/cur# su user1
Cannot execute /bin/bash: Permission denied




2. I have installed and setup exim4 with clam and spamassissin following a great article for multiple domains - at koivi.com/exim4-config/ (i can not post a url)

I am able to send out emails, but unable to recieve any, i do not know if the issue is because of #1. I am also running squirrelmail. I do not see any mail there either.


I get this in the exim4's mainlog file:
malware acl condition: clamd: unable to connect to UNIX socket /var/run/clamav/clamd.ctl (Connection refused)

1. Are you already a super user (because #, not $ in shell)?
If you just want to give command with higher rights you may want to use sudo + command (if sudo is set up for use).

thanks for pointing htat out. I am already root when i execute it.
My issue is that i can not execute the su command.
Now - i am seeing other strange stuff..like when i try to logon from the gui console of the server as a user, it will not let me in.
Through the kde, I see a xterm session pop up and it says /bin/bash permission denied!

I am seeing strange things like that that do not make sense.

Do you know how i can refressh the main packages i have already installed on debian.
Possibly even update to the latest kernel. I think my system might have been comprimised.

thanks
mjh

If you've been compromised you should wipe the system and reload clean..
Never try to repair an install that has been compromised, because you can't be certain you got everything..

This command should re-install everything that is currently installed..

aptitude reinstall '~i'



but I'd advise a clean install if you think you've been compromised