Can't connect to localhost even after updating password into conf file

[zer0890]

I changed my password 3 weeks ago , i think i restarted my server and since yesterday i had no issue to create new DB.
This morning, i tried to create a new DB and i got the error can't connect to localhost.
The password into
/usr/local/vesta/conf/mysql.conf
and root/my.conf are updated.

Also i have the same issue with roundcube :
DATABASE ERROR: CONNECTION FAILED!
Unable to connect to the database!

I have some websites that are running and they can communicate with the DB ( like http://zertech.tech ) ...
I dont know what to do if anyone can help me, i will be ready to provide my access.

Thanks

[zer0890]

If it can help anyone, i dont know how but maybe root password was updated on my conf file, but not into the DB itself.
I followed this topic

https://www.digitalocean.com/community/ ... t-password

By reseting manually root password with mine and it worked.

[sandy]

easy guide to reset root password
https://www.mysterydata.com/how-to-rese ... emd-linux/