Ubuntu mysql: have memory and encoding setting, how-to?

Question

MySQL

1. Mysql has memory, and immediately after rebooting the server:

2. Encoding setting, by default in phpMyAdmin I see: utf8mb4_bin, when scripts are running:

\u0411\u0435\u0441\u0441\u043c\u0435\u0440\u0442\u043d\u044

Tried to edit configs in /ect/mysql/

something like:

[mysql]
character-set-server=utf8
collation-server=utf8_general_ci
init-connect="SET NAMES utf8"

table_open_cache = 1024
query_cache_limit = 2M
query_cache_size = 56M
query_cache_type = 1
thread_cache_size = 16

max_heap_table_size = 56M
tmp_table_size = 56M

I restart the mysql server and nothing changes, where and what to register?