pg_controldata - display control information of a PostgreSQL database cluster

pg_controldata prints information initialized during initdb, such as the catalog version. It also shows
       information about write-ahead logging and checkpoint processing. This information is cluster-wide, and
       not specific to any one database.

       This utility can only be run by the user who initialized the cluster because it requires read access to
       the data directory. You can specify the data directory on the command line, or use the environment
       variable PGDATA. This utility supports the options -V and --version, which print the pg_controldata
       version and exit. It also supports options -?  and --help, which output the supported arguments.

PGDATA
           Default data directory location

       PG_COLOR
           Specifies whether to use color in diagnostic messages. Possible values are always, auto and never.

PostgreSQL 17.5                                       2025                                     PG_CONTROLDATA(1)

       pg_controldata - display control information of a PostgreSQL database cluster

pg_controldata [option] [[-D | --pgdata]datadir]