Upgrading cacti from 0.8.8H to 1.1.38 on raspberry pi

[kb83425]

Hello,
I'm trying to update cacti from 0.8.8H on a raspberry pi to 1.1.38. I am following the manual which suggests commands as listed here:
https://cacti.net/downloads/docs/html/upgrade.html

Where are cacti database and cacti located? When I issued the first command in /home/pi directory, I got a response as below:

Code: Select all

mysqldump -l --add-drop-table cacti > mysql.cacti
mysqldump: Got error: 1045: "Access denied for user 'pi'@'localhost' (using password: NO)" when trying to connect

Perhaps that command has to be typed with -u -p options but exact syntax of those commands is not given. I intend to setup cacti 1.1.38, php 7 and thold 1.0.2+ on it with appropriate version of mariadb, mysql.
Thanks.

[kb83425]

Cacti is displaying graphs in 0.8.8H and I need to upgrade till 1.1.38 to make thold work in cacti. At the moment, thold 0.50 doesn't work with php whose version is: PHP 7.0.27-0+deb9u1 (cli) (built: Jan 5 2018 13:51:52) ( NTS ). The other option is to downgrade php from 7.0.27 to 5.5.9 because thold 0.5 worked with cacti 0.8.8h and php 5.5.9.
Any suggestions or tips on how to update cacti on a raspberry pi 3 from 0.8.8H to 1.1.38?