PostgreSQL Authentication

PostgreSQL default authentication control really sucks. I modified it like this,

1. su - postgres
2. psql
3. show hba_file;
4. vi the hba_file and comment out all default settings
5. add a line "local all all md5"
6. now it works from command line and phpPgAdmin web screen

But I want the authentication for user postgres works as default, so I add first line as "local all postgres indent sameuser"