If you define connection settings in the pg_probackup3.conf configuration file, you can omit connection options in all the subsequent pg_probackup3 commands. However, if the corresponding environment variables are set, they get higher priority. The options provided on the command line overwrite both environment variables and configuration file settings.

If nothing is given, the default values are taken. By default, pg_probackup3 tries to use local connection via Unix domain socket (localhost on Windows) and tries to get the database name and the user name from the PGUSER environment variable or the current OS user name.