I also see from the same link, both of them works perfectly?
METHOD #1
You can use pt-show-grants from Percona Toolkit
MYSQL_CONN="-uroot -ppassword"
pt-show-grants ${MYSQL_CONN} > MySQLUserGrants.sql
METHOD #2
You can emulate pt-show-grants with the following
``` MYSQL_CONN="-uroot -ppassword" mysql ${MYSQL_CONN} --skip-column-names -A -e"SELECT CONCAT('SHOW GRANTS FOR ''',user,'''@''',host,''';') FROM mysql.user WHERE user<>''" | mysql ${MYSQL_CONN} --skip-column-names -A | sed 's/$/;/g' > MySQLUserGrants.sql ```