What are the specific steps to install MySQL under Linux?

How to install MySQL under Linux? MySQL is a relational database management system. MySQL is one of the most popular relational database management systems. In terms of WEB applications, MySQL is one of the best RDBMS (Relational Database Management System) application software.

Specific steps to install MySQL on Linux

Download address: https://dev.mysql.com/downloads/mysql/5.7.html#downloads

Unzip

 tar -xvf mysql-5.7.26-linux-glibc2.12-x86_64.tar

Move and rename it

 mv mysql-5.7.26-linux-glibc2.12-x86_64 /usr/local/mysql

Create mysql user groups and users and modify permissions

 groupadd mysql
 
 useradd -r -g mysql mysql

Create the data directory and grant permissions

 mkdir -p  /data/mysql              #创建目录
 
 chown mysql:mysql -R /data/mysql   #赋予权限

Configure my.cnf

 vim /etc/my.cnf

The content is as follows

 [mysqld]
 
 bind-address=0.0.0.0
 
 port=3306
 
 user=mysql
 
 basedir=/usr/local/mysql
 
 datadir=/data/mysql
 
 socket=/tmp/mysql.sock
 
 log-error=/data/mysql/mysql.err
 
 pid-file=/data/mysql/mysql.pid
 
 #character config
 
 character_set_server=utf8mb4
 
 symbolic-links=0
 
 explicit_defaults_for_timestamp=true

##Initialize the database

Enter the bin directory of mysql

 cd /usr/local/mysql/bin/

Initialization

 ./mysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql/ --datadir=/data/mysql/ --user=mysql --initialize

View password

 cat /data/mysql/mysql.err

Start mysql and change the root password

First place mysql.server in /etc/init.d/mysql

 cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql

start up! ! !

 service mysql start
 
 
 ps -ef|grep mysql

This means that mysql has been installed successfully! !

Change the password below

First log in to mysql, the previous one is randomly generated.

 ./mysql -u root -p   #bin目录下

Perform the following three steps and then log in again.

 SET PASSWORD = PASSWORD('123456');
 
 ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
 
 FLUSH PRIVILEGES;

If you use remote connection at this time... you will find that you cannot connect.

The following three commands are mainly executed here (log in to the database first)

 use mysql                                            #访问mysql库
 
 update user set host = '%' where user = 'root';      #使root能再任何host访问
 
 FLUSH PRIVILEGES;                                    #刷新

ok! ! ! ! MySQL5.7 is installed... there are really many pitfalls... but if you follow this process, you should be able to install it smoothly. (Because I installed it twice...)

If you don’t want to go to the bin directory every time to use the mysql command, execute the following command

 ln -s  /usr/local/mysql/bin/mysql    /usr/bin

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