Update cheatsheets

tldr/pg_checksums

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pg_checksums
+
+> Enable, disable, or check data checksums in a PostgreSQL database cluster.
+> More information: <https://www.postgresql.org/docs/current/app-pgchecksums.html>.
+
+- Check data checksums in a database cluster:
+
+`pg_checksums {{[-D|--pgdata]}} {{path/to/data}}`
+
+- Enable data checksums in a database cluster:
+
+`pg_checksums {{[-e|--enable]}} {{[-D|--pgdata]}} {{path/to/data}}`
+
+- Disable data checksums in a database cluster:
+
+`pg_checksums {{[-d|--disable]}} {{[-D|--pgdata]}} {{path/to/data}}`
+
+- Check data checksums with verbose output:
+
+`pg_checksums {{[-v|--verbose]}} {{[-D|--pgdata]}} {{path/to/data}}`
+
+- Check data checksums showing progress:
+
+`pg_checksums {{[-P|--progress]}} {{[-D|--pgdata]}} {{path/to/data}}`
+
+- Display help:
+
+`pg_checksums {{[-?|--help]}}`