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Postgresql install initdb12/19/2023 This option specifies the authentication method for local users via TCP/IP connections used in pg_hba.conf ( host lines). trust is the default for ease of installation. initdb will prepopulate pg_hba.conf entries using the specified authentication method for non-replication as well as replication connections.ĭo not use trust unless you trust all local users on your system. This option specifies the default authentication method for local users used in pg_hba.conf ( host and local lines). More details can be found in Section 23.3. To alter the default encoding, use the -encoding. More details can be found in Section 23.1. All server locale values ( lc_*) can be displayed via SHOW ALL. You can also use -locale to set the default for all locale categories, including collation order and character set classes. The remaining locale categories can be changed later when the server is started. For these reasons it is important to choose the right locale when running initdb. Collation orders other than C or POSIX also have a performance penalty. To alter the default collation order or character set classes, use the -lc-collate and -lc-ctype options. initdb determines those settings for the template1 database, which will serve as the default for all other databases. The character set encoding, collation order ( LC_COLLATE) and character set classes ( LC_CTYPE, e.g., upper, lower, digit) can be set separately for a database when it is created. Initdb initializes the database cluster's default locale and character set encoding. Since the server cannot be run as root, you must not run initdb as root either. Initdb must be run as the user that will own the server process, because the server needs to have access to the files and directories that initdb creates. To initialize in such a setup, create an empty data directory as root, then use chown to assign ownership of that directory to the database user account, then su to become the database user to run initdb. (Therefore, anything installed in template1 is automatically copied into each database created later.) The postgres database is a default database meant for use by users, utilities and third party applications.Īlthough initdb will attempt to create the specified data directory, it might not have permission if the parent directory of the desired data directory is root-owned. When you later create a new database, everything in the template1 database is copied. A database cluster is a collection of databases that are managed by a single server instance.Ĭreating a database cluster consists of creating the directories in which the database data will live, generating the shared catalog tables (tables that belong to the whole cluster rather than to any particular database), and creating the template1 and postgres databases. Initdb creates a new PostgreSQL database cluster.
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