docs - minor edits to docs.

gpdb-doc/dita/best_practices/sysconfig.xml

@@ -19,14 +19,14 @@
         information, Greenplum Database cannot match the system timezone with a PostgreSQL timezone.
         In this case, Greenplum Database calculates a "best match" with a PostgreSQL timezone based
         on information from the host system.</p>
-      <p>As a best practice, configure the Greenplum Database and the host system to use a known,
+      <p>As a best practice, configure Greenplum Database and the host systems to use a known,
         supported timezone. This prevents Greenplum Database from recalculating a "best match"
         timezone each time the cluster is restarted, using the current system timezone and Greenplum
         timezone files (which may have been updated from the IANA database since the last restart).
         Use the <codeph>gpconfig</codeph> utility to show and set the Greenplum Database timezone.
         For example, these commands show the Greenplum Database timezone and set the timezone to
           <codeph>US/Pacific</codeph>.<codeblock># gpconfig -s TimeZone
-# gpconfig -c TimeZone 'US/Pacific'</codeblock>You
+# gpconfig -c TimeZone -v 'US/Pacific'</codeblock>You
         must restart Greenplum Database after changing the timezone. The command <codeph>gpstop
           -ra</codeph> restarts Greenplum Database. The catalog view
           <codeph>pg_timezone_names</codeph> provides Greenplum Database timezone information.</p>