linux install mysql8

View the system version:

cat /etc/centos-release
CentOS Linux release 8.0.1905 (Core)

Download the resource package to the mysql official website according to the system version

Version: Linux-Generic

Linux - Generic (glibc 2.12) (x86, 64-bit), Compressed TAR Archive

Download and install

Install Upload Toolkit

yum install -y lrzsz

upload files:

rz

　unzip files:

xz -d mysql-8.0.19-linux-glibc2.12-x86_64.tar.xz
tar -xvf mysql-8.0.19-linux-glibc2.12-x86_64.tar

　　Move files:

mv mysql-8.0.19-linux-glibc2.12-x86_64 /usr/local/mysql

Create the data directory:

mkdir data

Create mysql user group and mysql user

groupadd mysql
useradd -g mysql mysql

Change mysql directory permissions

chown -R mysql.mysql /usr/local/mysql/
or
chown -R mysql .
chgrp -R mysql .

Because my.cnf will not be automatically generated and created manually:

touch /etc/my.cnf

Modified content:

vim my.cnf

[mysqld]
    basedir = /usr/local/mysql   
    datadir = /usr/local/mysql/data
    socket = /usr/local/mysql/mysql.sock
    character-set-server=utf8
    port = 3306
   sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
 [client]
   socket = /usr/local/mysql/mysql.sock
   default-character-set=utf8

ESC save

: wq exit

Change directory permissions

chown -R mysql:mysql /usr/local/mysql

Initialize the database:

method one:

bin / mysqld --initialize --user = mysql --basedir = / usr / local / mysql --datadir = / usr / local / mysql / data // Initialize the database

Method 2:

/usr/local/mysql/bin/mysqld --initialize --user=mysql

The second way I use:

/usr/local/mysql/bin/mysqld --initialize --user=mysql


A temporary password is generated for root@localhost: x2+JhQ1=?n/W

The temporary password after A temporary password should be remembered: x2 + JhQ1 =? N / W 


Configure MySql service:

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld 
chmod + x /etc/init.d/mysqld // seems to report an error, continue to execute the following 
chmod + x / etc / rc .d / init.d / mysqld 
chkconfig --add mysqld 
chkconfig --list mysqld

Configure global environment variables:

vi /etc/profile

Add the following two lines of configuration at the bottom of the profile file, save and exit


export PATH=$PATH:/usr/local/mysql/bin:/usr/local/mysql/lib
export PATH

Execute after saving and exiting:

source /etc/profile

Start the MySql service:

service mysql start
或
/usr/local/mysql/support-files/mysql.server start

View the MySql startup status:

service mysql status

Password login:

mysql -uroot -p password

change Password:

update user set authentication_string='' where user='root';
FLUSH PRIVILEGES;

Re-login:

alter user 'root'@'localhost' identified by '新密码';
FLUSH PRIVILEGES;

Set up to log in remotely

mysql>use mysql
mysql>update user set host='%' where user='root' limit 1;
mysql>flush privileges;

Firewall installation:

yum install firewalld

Open port 3306:

firewall -cmd --permanent --add-prot=3306/tcp

Add under / etc / my.cnf [mysqld]
skip-grant-tables  

Password-free login


service mysqld restart

linux install mysql8

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