We have replaced and upgraded shell.ima.umn.edu. This is now running our IMA release
of Ubuntu (Dapper). Please report any problems with this system to help@ima.umn.edu

You may start seeing error messages that say something like this:

  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
  @    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
  IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
  Someone could be eavesdropping on you right now (man-in-the-middle attack)!
  It is also possible that the RSA host key has just been changed.
  The fingerprint for the RSA key sent by the remote host is
  e3:06:b1:1f:2a:2d:b5:fc:6a:c3:ea:d6:29:d2:78:f1.
  Please contact your system administrator.
  Add correct host key in /ima/home/user/.ssh/known_hosts to get rid of
  this message.
  Offending key in /ima/home/user/.ssh/known_hosts:6
  RSA host key for titanium has changed and you have requested strict
  checking.
  Host key verification failed.

This is normal, do not be afraid. All you have to do is delete one line
from a config file. All the information is given above

  Offending key in /ima/home/user/.ssh/known_hosts:6

Simply open the file ~/.ssh/known_hosts and delete line 6, or what ever line is
specified in the error you receive.