RPM installation MySql 5.7.33 and one-click installation script under Linux

Install MySql 5.7.33 via RPM under Linux

• Download MySql related packages

• Relevant packages have dependencies and need to be installed in sequence

rpm -ivh mysql-community-common-5.7.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-5.7.33-1.el7.x86_64.rpm

• Initialize the password (the password is empty after the initial completion)

mysqld --initialize-insecure --user=mysql

• Start MySql

systemctl start mysqld

• Login and update password and grant remote connection

mysql -u root --skip-password

ALTER USER 'root'@'localhost' IDENTIFIED BY 'YOURPASSWD';
grant all privileges on *.* to 'root'@'%'  IDENTIFIED BY '2660c1dd1942844f';
update mysql.user set grant_priv='Y' where user='root';
flush privileges;

• Related one-click installation scripts

Before installation, you need to put the relevant rpm package and the script in the same directory

function IN_MYSQL () {
    local PACK_PARH=$(cd $(dirname $0); pwd)
    cd $PACK_PATH
    pkill mysql
    sleep 5
    for i in `rpm -qa | grep msyql`;do rpm -e --nodeps $i;done
    for i in `rpm -qa | grep mariadb`;do rpm -e --nodeps $i;done
    \rm -rf /var/lib/mysql /etc/my.cnf /var/log/mysqld.log
    rpm -ivh mysql-community-common-5.7.33-1.el7.x86_64.rpm
    rpm -ivh mysql-community-libs-5.7.33-1.el7.x86_64.rpm
    rpm -ivh mysql-community-client-5.7.33-1.el7.x86_64.rpm
    rpm -ivh mysql-community-server-5.7.33-1.el7.x86_64.rpm
    
    # Init mysql
    mysqld --initialize-insecure --user=mysql
    systemctl start mysqld
    mysql -u root --skip-password -e "ALTER USER 'root'@'localhost' IDENTIFIED BY '2660c1dd1942844f';grant all privileges on *.* to 'root'@'%'  IDENTIFIED BY '2660c1dd1942844f';update mysql.user set grant_priv='Y' where user='root';flush privileges;"

    # Add a power-on boot
    systemctl enable mysqld

    ps aux | grep mysql | grep -v grep
    if [ $? -eq 0 ]; then
        
        echo '=========== mysql install successed ================'
    else
        echo '=========== mysql install failed ===================='
    fi
}

IN_MYSQL

Summary of relevant knowledge:
1. Since version 5.7.6, the data directory and root account are initialized by mysqld --initialize, and versions before 5.7.6 are initialized by mysql_install_db;
2. Using --initialize will generate a random initial value for the root account Password, we can use the command: mysql -u root -p, and then enter the password to log in to MySQL. Using –initialize-insecure will not generate a random initial password for the root account, we can use the command: mysql -u root --skip-password to log in to MySQL directly;
3. When mysqld displays the following error message:
[ERROR] --initialize specified but the data directory exists. Aborting, please execute rm -rf /var/lib/mysql