[mysql] install mysql5.7

Catalog

1. summary

2. Download installation package

3. Check before installation

4. install Mysql

5. start-up Mysql

6. Login and setup

7. common problem

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install Mysql5.7

1. summary

This experiment is used in Linux7.6 install mysql5.7, For personal learning Mysql Basic function , The production environment may not be suitable .

2. Download installation package

mysql-community-client-5.7.18-1.el7.x86_64.rpm

mysql-community-common-5.7.18-1.el7.x86_64.rpm

mysql-community-libs-5.7.18-1.el7.x86_64.rpm

mysql-community-server-5.7.18-1.el7.x86_64.rpm

3. Check before installation

explain ： If the installation fails or needs to be reinstalled Mysql, You can also refer to the following execution steps .

3.1 Check if it is installed mysql

rpm -qa | grep mysql

If the result is returned , Then execute the delete command , Delete package

rpm  -e mysql-xxx

3.2 Check for installation mariadb

rpm -qa | grep mariadb      # Find out if it comes with mariadb library

If the result is returned , Then execute the delete command , Delete package

rpm -e mariadbxxx  --nodeps          # Delete

3.3 Check if there is Mysql Related configuration files

find / -name mysql          # Find and mysql Related files or folders

If the result is returned , Then execute the delete command one by one

rm –rf /xxx/xxx/mysql        # Delete and mysql Relevant files or folders

rm -rf /etc/my.cnf          # Delete profile

4. install Mysql

rpm When installing , There are four bags , The installation sequence is as follows ：common—>lib—>client—>server,

Unload in reverse order . The following two parameters are not required in the installation ：—force –nodeps, Otherwise, you may make mistakes and don't notice , Instead, the installation failed .

Installation sequence ( Strictly follow the order )：

rpm -ivh mysql-community-common-5.7.18-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-5.7.18-1.el7.x86_64.rpm

rpm -ivh mysql-community-client-5.7.18-1.el7.x86_64.rpm

rpm -ivh  mysql-community-server-5.7.18-1.el7.x86_64.rpm

5. start-up Mysql

5.1 start-up

systemctl start mysqld.service

5.2 Set up mysql The service is startup

systemctl enable mysqld

6. Login and setup

6.1 Query initial password

You need to find the initial password before logging in for the first time after installation , Execute the following command to find the initial password

cat /var/log/mysqld.log | grep password

6.2 Sign in

mysql -uroot -p< password >

6.3 Set the password

You need to change your password after logging in for the first time , Execute the following command to change the password

Mode one ：

set password for [email protected]=password('[email protected]');

Mode two ：

set password = password('[email protected]');

alter user 'root'@'localhost' password expire never;

flush privileges;

7. common problem

7.1 rpm Abuse parameters during installation --nodeps

Incorrect installation sequence . such as mysql-libs The installation of requires mysql-common For the premise , If not installed mysql-common when , install mysql-libs It's time —nodeps, No error will be prompted , But there are actually problems