Hi,there:

i have a problem about kerberos authenticion in postgresql

step1
../configure --with-krb5
step2
./initdb -A krb5 -D ../data
initdb: unrecognized authentication method "krb5"
Anyone who had encountered such a problem?

and how to set kerberos authentication in postgresql 8,any docment exist?

initdb did not have such option krb5.
See here
PostgreSQL: Documentation: Manuals: PostgreSQL 9.0: Authentication methods