Ubuntu 24.04 / postgres v16 with primary and secondary:

1. * shutdown primary and secondary
3. * and:

1.   - sudo -u postgres /usr/lib/postgresql/16/bin/pg_checksums -P -e -D PGDATA
     - 

4. - Start the primary and secondary
7. - And check if checksum is enabled on both (on):

9.   - sudo -u postgres psql -c "show data_checksums"
     -