1. How to log in to mire without typing your password

Zeroth, you must have openssh client 4.3 or later. Other versions may work, but we make no guarantees. You will also want the krb5-user package if you are using Debian or Ubuntu.

Then, you must obtain kerberos tickets. If your username is "fred", you would do this by typing

   kinit fred@HCOOP.NET

Then type your password when prompted. Note that you MUST capitalize HCOOP.NET and you MUST NOT capitalize your user name. This is important.

Next, make sure you have your tickets. To do this, type

   klist

You should see your tickets and their expiration dates.

Last, type

   ssh -o 'GSSAPIAuthentication yes' -o 'GSSAPIDelegateCredentials yes' fred@mire.hcoop.net

(GSSAPI is sort of like Kerberos. Don't worry about the difference at this point.)

If that doesn't work, add "-vvv" to the command line and copy and paste the ENTIRE output into an email to hcoop-discuss and we'll tell you what's up.

If you do this a lot, you can include the GSSAPIAuthentication and GSSAPIDelegateCredentials options in your .ssh/config file. But you should NOT turn on GSSAPIDelegateCredentials for arbitrary hosts (make sure you only enable it for HCOOP hosts). Here's what AdamMegacz uses:

Host deleuze.hcoop.net
  ForwardX11Trusted yes
  GSSAPIAuthentication yes
  GSSAPIDelegateCredentials yes
  User megacz_admin
Host mire.hcoop.net
  ForwardX11Trusted yes
  GSSAPIAuthentication yes
  GSSAPIDelegateCredentials yes
  User megacz_admin

2. If it doesn't work

See TroubleshootingKerberos