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Old 11-08-2012, 10:08 PM   #1
cvillelk
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Registered: Nov 2012
Posts: 1

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Trouble with su when in Xen DomU [Debian]


I've encountered an issue that has me completely stumped. I have several identical Debian installations in KVM and on the Dom0 which don't cause this problem.

When ssh'ed into the Xen DomU, I try and switch to root using su and receive the following error (using the correct root password):

Quote:
me@server$ su
Password:
su: Authentication failure

However this command works:


Quote:
me@server$ sudo su
Password:
root@server$

I can also su from user -> root when logged in at the Virt-Manager VNC session.


ls -l /bin/su
-rwsr-xr-x 1 root root 34024 Feb 15 2011 /bin/su


auth.log
-------------------
su[6904]: pam_unix(su:auth): authentication failure; logname=me uid=1000 euid=0 tty=/dev/tty1$
su[6904]: pam_authenticate: Authentication failure
su[6904]: FAILED su for root by me



Any ideas would be greatly appreciated
 
Old 11-11-2012, 03:12 PM   #2
smallpond
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Registered: Feb 2011
Location: Massachusetts, USA
Distribution: CentOS 6 (pre-systemd)
Posts: 1,683

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Are you running selinux?
 
  


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