This article still uses xftp to upload gz files, and then operates on xShell. If you do not install these two files, please refer to the previous blog.

1. Upload the downloaded file to the corresponding location with xftp.

 

2. Unzip the file: tar-zvxf-mysql-5.7.28-linux-glibc2.12-x86_.tar.gz

3. Create mysql folder under / usr/local folder

mkdir  /usr/local/mysql

4. Move the extracted mysql file to / usr/local/mysql:

mv mysql-5.7.28-linux-glibc2.12-x86_64/* /usr/local/mysql

5. Add mysql user group and mysql user for centos (- s / bin/false) parameter to specify that mysql user only owns ownership, but does not have login permission), and the codes at both ends are executed respectively. You can view mysql permissions through LL (lowercase L)

groupadd mysql
    
useradd -r -g mysql -s /bin/false mysql

6. Enter the folder / usr/local/mysql:

cd /usr/local/mysql

7. View MySQL's search path for the configuration file. The left is the priority:

./bin/mysql --help | grep 'Default options' -A 1

8. Create profile:

rm -rf /etc/my.cnf
touch /etc/my.cnf 

9. Edit my.cnf file:

vi /etc/my.cnf

10. Press i to start editing the file; add in / etc/my.cnf:

[mysqld] 
port=3306 
datadir=/var/lib/mysql/data 
socket=/var/lib/mysql/data/mysql.sock 
user=root 
max_connections=151 
symbolic-links=0
# Set ignore case 
lower_case_table_names = 1
# Specified encoding 
character-set-server=utf8 
collation-server=utf8_general_ci
#Specify the socket communication file path when the client connects to mysql 
[client] 
socket=/var/lib/mysql/data/mysql.sock

11. Copy the mysql startup script to the resource directory so that mysql can be started anywhere

cp ./support-files/mysql.server /etc/rc.d/init.d/mysql

12. Add mysqld service control script execution permission

chmod +x /etc/rc.d/init.d/mysql 

13. Add mysql service to system service

chkconfig --add mysql 

14. Check whether mysql service has taken effect

chkconfig --list mysql

15. Create the folder specified by mysql:

mkdir /var/lib/mysql/ 
mkdir /var/lib/mysql/data 

16. Change the owner and group of the file through chown, - R processes all files in the specified directory and its subdirectories:

chown -R mysql:mysql /var/lib/mysql/

17. Install mysql

mysqld --user=root --basedir=/usr/local/mysql --datadir=/var/lib/mysql/data --initialize

After the installation is successful, you need to pay attention to the last line: ා wq.os6? < WWK is the random password of mysql

    2019-10-27T01:28:32.711916Z 1 [Note] A temporary password is generated for root@localhost: #WQ.os6?<wwk

18. Start mysql:

service mysql start

19. Configure environment variables:

vi /etc/profile

//Add at the end:
export PATH=$PATH:/usr/local/mysql/bin

20. Refresh the file of environment variable:

source /etc/profile

21. Change the login password: enter the password and enter:

mysql> alter user 'root'@'localhost' identified by 'Password you want to change'; 
mysql> flush privileges;
mysql> quit;

22. Restart mysql:

service mysql restart

23. Configure remote access and firewall port settings for remote access:

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

24. After configuration, you can view the open remote ports:

 firewall-cmd --list-port

25. Set permissions to allow remote connection to the database:

update mysql.user set user.Host='%' where user.User='root';

   Refresh permission:

   flush privileges;

26. Test whether IP can be used for remote link (my linux IP is 192.168.189.150):

./bin mysql -u root -p -h192.168.189.150

If you enter a password, you can connect to mysql. That is to say, you have successfully installed mysql on centos!!!