`pg_conftool` - read and edit PostgreSQL cluster configuration files (postgresql-common)

pg_conftool [OPTIONS] [version cluster] [configfile] {show|set|remove|edit} [parameter [value]]

Examples

$ pg_conftool 18 main show max_connections

what the file says

$ sudo pg_conftool 18 main set work_mem 16MB

change it in postgresql.conf

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