MySQL 8.0.25 installation and configuration tutorial under Linux

getconf LONG_BIT 

tar -xvf mysql-8.0.25-linux-glibc2.12-x86_64.tar.xz

mv mysql-8.0.25-linux-glibc2.12-x86_64 /home/mysql-8.0.25
#Detailed explanation: mv The folder name where the current file name is modified

# 1. Create a folder mkdir -p /data/mysqldata/
#2 Create a database user. You will need it for file configuration and initialization later. If you have other users, you don’t need to create a new one. #2.1 Create a user group groupadd mysql
 #2.2 Create user useradd -r -g mysql mysql
#Give permissions 2. chown mysql:mysql -R /data/mysqldata #chown username:usergroup-R /data/mysqldata
3. chmod 750 /data/mysqldata/ -R

vim /etc/profile 
#If your system does not support vim command, use the following vi /etc/profile
#Edit, add the following code to the last line of the document export PATH=$PATH:your MySQL decompression path/mysql-8.0.25/bin:your MySQL decompression path/mysql-8.0.25/lib 

#1. Edit the my.cnf file vim /etc/my.cnf #or vi /etc/my.cnf 

#2. Press insert to enter edit mode and add the following script [mysql]
# Client default character set default-character-set=utf8mb4
[client]
port=3306
socket=/var/lib/mysql/mysql.sock
[mysqld]
port=3306
server-id=3306
user=mysql
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Set the installation directory of mysql basedir=/home/mysql-8.0.25 # Your own installation path # Set the storage directory of mysql database datadatadir=/data/mysqldata/mysql # The storage path of the database file you created yourself log-bin=/data/mysqldata/mysql/mysql-bin
innodb_data_home_dir=/data/mysqldata/mysql
innodb_log_group_home_dir=/data/mysqldata/mysql
character-set-server=utf8mb4
lower_case_table_names=1
autocommit=1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd

[mysqld_safe]
#Set the storage directory of mysql database log and process data log-error=/data/mysqldata/mysql/mysql.log
pid-file=/data/mysqldata/mysql/mysql.pid

1. cd /home/mysql-8.0.25/bin/
2. ./mysqld --defaults-file=/etc/my.cnf --basedir=/home/mysql-8.0.25/ --datadir=/data/mysqldata/mysql --user=mysql --initialize
#Parameter Details --defaults-file=/etc/my.cnf specifies the configuration file (must be placed first, at least before --initialize)
--user=mysql specifies the user (very important)
--basedir=/home/mysql-8.0.25/ specifies the installation directory --datadir=/data/mysqldata/mysql/ specifies the initialization data directory

# 1. Copy the mysql.server file cp /home/mysql-8.0.25/support-files/mysql.server /etc/init.d/mysql
cp /home/mysql-8.0.25/support-files/mysql.server /etc/init.d/mysqld
# 2. Grant permissions chown 777 /etc/my.cnf
chmod +x /etc/init.d/mysql
chmod +x /etc/init.d/mysqld
# 3. Check if /var/lib/mysql exists. If not, create it. mkdir /var/lib/mysql #Keep the directory consistent with my.cnf. # 4. Grant permissions. chown -R mysql:mysql /var/lib/mysql/ #Keep the directory consistent with my.cnf. # 5. Start the database. service mysql start #Or systemctl mysql start

mysql -u root -p

#Enter the installation directory cd /home/mysql-8.0.25/bin
# Execute the command ./mysql -uroot -p

# Change the root password. Change the root user to only be able to connect locally. ALTER USER 'root'@'localhost' IDENTIFIED with mysql_native_password BY 'new password';
#Flush privileges;

#Create a user for any remote accessCREATE user 'mysql'@'%'; 
#Change password alter user 'mysql'@'%' identified with mysql_native_password by 'new password';

create database test default character set utf8mb4 collate utf8mb4_unicode_ci;
#create database database name default character set utf8mb4 collate utf8mb4_unicode_ci;

#Grant all privileges on test database to mysql user grant all privileges on test.* to "mysql"@"%";
#Flush privileges;

#1. Check if there is mysql service chkconfig --list
#2. Enter the mysql software directory and copy the mysql.server file to the /etc/rc.d/init.d directory cp /home/mysql-8.0.25/support-files/mysql.server /etc/rc.d/init.d/mysql
#3. Grant executable permissions to /etc/rc.d/init.d/mysql chmod +x /etc/rc.d/init.d/mysql
#4. Add mysql service chkconfig --add mysql
#5. Enable mysql service to start automatically at boot time chkconfig --level 345 mysql on
#6. Check the MySQL service, restart the server, and test whether it is successful.
chkconfig --list