How to configure mysql on ubuntu server and implement remote connection

# eric @ userver in ~ [14:00:31] 
$ sudo apt install mysql-server install mysql-client libmysqlclient-dev

# eric @ userver in ~ [14:10:55] 
$ sudo netstat -tap | grep mysql
tcp 0 0 localhost:mysql *:* LISTEN 5287/mysqld  

# eric @ userver in ~ [14:16:26] 
$ sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf 
#Comment out bind-address = 127.0.0.1
#bind-address = 127.0.0.1

# eric @ userver in ~ [14:16:26] 
$ sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf 
#Add in [mysqld]: character-set-server=utf8
[mysqld]
#
# * Basic Settings
#
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking
character-set-server=utf8 #Newly added#Login to mysql to view characters# eric @ userver in ~ [14:21:26]
$ mysql -u root -p
Enter password: 
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.20-0ubuntu0.16.04.1 (Ubuntu)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show variables like '%char%';
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)

mysql> create user 'eric'@'%' identified by 'lyd2017';
Query OK, 0 rows affected (0.01 sec)
mysql> grant all on *.* to 'eric'@'%';--All permissions Query OK, 0 rows affected (0.00 sec)

GRANT SELECT, INSERT ON mysql.tables TO 'eric'@'%';
GRANT ALL ON *.* TO 'eric'@'%';

GRANT privileges ON databasename.tablename TO 'username'@'host' WITH GRANT OPTION;

# eric @ userver in ~ [14:35:49] 
$ /etc/init.d/mysql restart 
[....] Restarting mysql (via systemctl): mysql.service==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
Authentication is required to restart 'mysql.service'.
Authenticating as: eric,,, (eric)
Password: 
==== AUTHENTICATION COMPLETE ===

# eric @ ray in ~ [14:32:12] C:127
$ sudo apt install mysql-client
[sudo] password for eric: 
Reading package lists... Done

# eric @ ray in ~ [14:37:13] C:1
$ mysql -h 192.168.122.58 -u eric -p #
Enter password: 
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 15
Server version: 5.7.20-0ubuntu0.16.04.1 (Ubuntu)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>

# eric @ ray in ~ [14:35:22] C:1
$ mysql -h 192.168.122.58 -u root -p
Enter password: 
ERROR 1045 (28000): Access denied for user 'root'@'192.168.122.1' (using password: YES)

#If you log in directly as the root user at the beginning, an error will be reported. You can modify the root password to solve this problem. mysql>SET PASSWORD FOR 'root'@'%' = PASSWORD("123456");