Installation
If you have local users matching the principals in a Kerberos realm, and just want to switch the authentication
from local to remote using Kerberos, you can follow this section. This is not a very usual scenario, but serves
to highlight the separation between user authentication and user information (full name, uid, gid, home
directory, groups, etc). If you just want to be able to grab tickets and use them, it’s enough to install
krb5−user and run kinit .
We are going to use sssd with a trick so that it will fetch the user information from the local system files,
instead of a remote source which is the common case.
To install the packages enter the following in a terminal prompt:
sudo apt i n s t a l l krb5−u s e r s s s d −krb5
You will be prompted for the addresses of your KDCs and admin servers. If you have been following this
chapter so far, the KDCs will be: kdc01.example.com kdc02.example.com (space separated)
And the admin server will be: kdc01.example.com. Remember that kdc02 is a read-only copy of the primary
KDC, so it doesn’t run an admin server.
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