credential cache file name

[Sandeep]

Hi all,

I have two questions regarding the credential cache.

1. I had read somewhere that it is possible to configure whether the Krb5 
credentials are to be stored in a file, or just in memory. How to configure that?
Does each user has this option about his/her credentials?

2. My credential cache file name is not /tmp/krb5cc_(uid), but something like
/tmp/krb5cc_a7s8mr. Why is that happening?

Thanks a lot.
Sandeep