If you have performed an installation with a package manager, you can use your choice of editor to access and modify the configuration files. By default, when installed with a package manager, the configuration files are located in:Unless otherwise noted, the commands and paths noted in the following section assume that you have performed an installation with the interactive installer.You can easily update configuration parameters that Advanced Server uses to decide the behavior of its component software by modifying the following configuration files:
• The postgresql.conf file determines the initial values of Advanced Server configuration parameters.
• The pg_hba.conf file controls network authentication and authorization.
• The pg_ident.conf file maps operating system identities (user names) to Advanced Server identities (roles) when using ident-based authentication.On a Windows system, the configuration files can be accessed from the Apps menu. To update these configuration files in Linux, navigate through the Postgres Plus Advanced Server 9.4 menu to the Expert Configuration menu and choose the menu selection that specifies the configuration file that you would like to edit (see Figure 6.1).