Centso8 installing mysql8.0 (Part 2)

Take on the above

4 Check the password , Sign in MySQL, Change Password , Set up remote access user groups , to open up 3306 port .

4.1 View default password

cat /var/log/mysqld.log | grep password

 A temporary password is generated for [email protected]: W?pd%*8k<xeI
 among 
W?pd%*8k<xeI
 Is the password 

4.2 Sign in MySQL

mysql -uroot -p

4.3 Change Password

adopt ALTER Change the default password to 'root'

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';

//
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'A';
A It's the password you want to set ,MySQL Has its own password specification . You can view it on the official website , You can also search directly .

4.4 Set up remote access user groups

mysql> create user 'root'@'%' identified with mysql_native_password by 'root';
// You can set your own password , The show is root
Query OK, 0 rows affected (0.01 sec)

mysql> grant all privileges on *.* to 'root'@'%' with grant option;
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'root' PASSWORD EXPIRE NEVER; 
Query OK, 0 rows affected (0.01 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

4.5 Open ports

sign out MySQL

exit

4.5.1iptables Open port of

[[email protected] ~]# vim /etc/sysconfig/iptables
========================================================================
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
// Added 3306 port 
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8090 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
========================================================================
[[email protected] ~]# systemctl restart iptables.service
[[email protected] ~]# systemctl enable iptables.service

You can choose to install , Suggest firewalldhttps://blog.csdn.net/rj2012001/article/details/121783690 

4.5.2 firewalld

Method https://blog.csdn.net/rj2012001/article/details/121674945https://blog.csdn.net/rj2012001/article/details/1216749455.0 end

Can pass Navicat 15 for MySQL Remote access