Installing mysql5.7 for Linux

1、 The first postfix and mariadb-libs Unload , Otherwise, there will be dependency package conflicts ：

# rpm -e postfix mariadb-libs

The above command cannot be used with the following :
1. uninstall redhat-lsb…

# rpm -ev redhat-lsb-core-4.1-27.el7.centos.1.x86_64

2. uninstall profix

# rpm -ev postfix-2.10.1-7.el7.x86_64

2、 install mysql Dependence net-tools and perl

# yum -y install net-tools perl

3、 install mysql-common package ：

#  rpm -ivh mysql-community-common-5.7.22-1.el7.x86_64.rpm

4、 install mysql-libs package ：

# rpm -ivh mysql-community-libs-5.7.22-1.el7.x86_64.rpm

If dependency detection fails ：
mariadb-libs is obsoleted by mysql-community-libs-8.0.20-1.el7.x86_64
Clear the previously installed dependencies

# yum remove mysql-libs

5、 install mysql-client package ;

# rpm -ivh mysql-community-client-5.7.22-1.el7.x86_64.rpm

6、 install mysql-server package

# rpm -ivh mysql-community-server-5.7.22-1.el7.x86_64.rpm

If the following error occurs

The lack of numactl package , Can be installed

# yum -y install numactl

Explain the lack of libaio package , Can be installed

# yum -y install libaio

7、 Set boot up ：

#  systemctl enable mysqld

8、 start-up MySql service

#  systemctl start mysqld

9、 Check the temporary password

because MySQL5.7 After installation, the root Assign a temporary password to a user , So let's check the temporary password first

#  grep 'temporary password' /var/log/mysqld.log
2018-06-01T19:40:08.341478Z 1 [Note] A temporary password is generated for [email protected]: Ct<pX.k7S(=w

After the colon is root User's temporary password ：Ct<pX.k7S(=w

10、 Sign in with a temporary password

#  mysql -u root -p
 Input password ：Ct<pX.k7S(=w

11、 Set up root Password ( Remember to add a semicolon )

mysql>ALTER USER 'root'@'localhost' IDENTIFIED BY 'Echoo123.';
mysql> exit

Be careful ：mysql5.7 Increased security level , The password must contain ： Case letters 、 Numbers and special symbols , And the length cannot be less than 8 position .

12、 Log in with your new password

#  mysql -u root -p

Input password ：Echoo123.

13、 Open remote login rights

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'Wipinfo123.'  WITH GRANT OPTION;
mysql> FLUSH PRIVILEGES;

14、 to open up mysql Of 3306 port

# firewall-cmd --zone=public --add-port=3306/tcp --permanent
# firewall-cmd --reload

15、 land Navicat make new connection

 user name ：IP Address 
 password ：	 Change your own password 
 If the connection is successful , It indicates that the setting is successful 

If there's a mess :
Add... After the link address bar useUnicode=true&characterEncoding=utf-8