I ran some upgrades lately and it all seemed to work fine - turns out now that it didnt. I tried to login via SSH today and while I can get to the Shell, I can't use SFTP anymore. I also can't switch to root (by using "su -") from the privileged account that is allowed to login as root - it seems that the wheelgroup has been modified by Plesk and didn't get changed correctly. Plesk also complains that nothing is installed (see attached screenshot) and the module manager (which I turned off now) went nuts telling me that apache wasn't running - while it actually worked perfectly. another downside: webmin doesnt work anymore since the admin account got ... well ... disabled / rewritten / set to non active - I dunno. [EDIT] when I tried sudo I got this: Code:sudo: can't stat /etc/sudoers: Input/output error and su gives me Code:-bash-2.05b$ su - su: ungÃƒÂ¼ltiges Kennwortwhich translates into: "incorrect password" normally when I enter "su -" I get asked for a password, not so today though. any thoughts on how I could ge this one figured out?