Database package download: https: //pan.baidu.com/s/1U1x_HSiLBzlcR6HLTRoF8g
extraction code: b5vt
After the download is uploaded to the server, the directory is to put my / usr / local
Install mysql steps:
Environmental clean-up
centos7 will own a mariadb
To see if you have installed
rpm -qa |grep -i mysqlcentos7 default system comes
rpm -qa |grep -i mariadb
mariadb mysql come from, is one of its branches, need to be cleaned out
Clean out mariadb package
Yum install you directly, then use the yum source mariadb, which is not the same with mysql official version, we have to install the official version, you need to clear out mariadb, and then manually install their own official version of mysql download
rpm -e plus package name, the package cleared mariadb
Rpm can be seen with the deletion will fail, suggesting the need to install software dependencies
rpm -e mariadb-libs-5.5.64-1.el7.x86_64
When rpm deleted if there are dependencies, you can use yum remove + package name to delete mariadb
yum remove mariadb-libs-5.5.64-1.el7.x86_64
Decompression mysql-8.0.16-2.el7.x86_64.rpm-bundle.tar uploaded
tar -xvf mysql-8.0.16-2.el7.x86_64.rpm-bundle.tar
start installation:
General use software installed with yum install directly can, but there is a problem: with yum, then, is to use the default mariadb yum source to find, could not be found, so our own install
rpm -ivh + package installation packages needed
rpm -ivh mysql-community-common-8.0.16-2.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.16-2.el7.x86_64.rpm
rpm -ivh mysql-community-libs-compat-8.0.16-2.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.0.16-2.el7.x86_64.rpm
rpm -ivh mysql-community-server-8.0.16-2.el7.x86_64.rpm
Now MySQL has been installed
The default configuration file path:
Profile: /etc/my.cnf
log file: /var/log/var/log/mysqld.log
service startup script: /usr/lib/systemd/system/mysqld.service
socket file: / var /run/mysqld/mysqld.pid
Check whether the installation is successful mysql, mysql to see representatives of relevant recent successful installation
rpm -qa | grep -i mysql
See if there mysql process
ps -ef | grep mysql
Start Service
systemctl start mysqld.serviceView mysql service is started
ps -ef | grep mysql
mysql installation is successful, delete the installation package (optional):
rm -rf mysql-*After the MySQL root will start to generate a random initial password
grep "password" /var/log/mysqld.log
Log database:
mysql -u root -pThen enter a random password knockout round
Information will be prompted to log in at: as connecting thread id, version of what
Before using to set its own password, if not set it will be required to set
To see what the library database
show databases;
Password rules: uppercase letters lowercase letters + numbers + + special symbol combination, otherwise it will error, as follows
change Password:
alter user 'root'@'localhost' identified by 'Aliwang!123';
View library again
show databases;
Create a user: CREATE USER 'username' @ '%' IDENTIFIED BY 'password';
CREATE USER 'mysql'@'%' IDENTIFIED BY 'Mysql2020!'; 
Authorization: GRANT ALL PRIVILEGES ON * * TO 'username' @ '%' WITH GRANT OPTION;
GRANT ALL PRIVILEGES ON *.* TO 'mysql'@'%' WITH GRANT OPTION;
Execution flush privileges; command take effect immediately
flush privileges;
If you want to set the root user can remotely access the following settings:
Use mysql database:
use mysql;
Modify a specific user host:
update user set host='%' where user='root';
Specifies the user's authorization
grant all privileges on mysql.* to root@'%';
Execution flush privileges; command take effect immediately
flush privileges;
Exit MySQL
exit
At this point, the entire configuration is complete mysql
mysql library will be built some systems:
information_schema keep some statistics
performance_schema keep some state data,
mysql stored data for monitoring, permissions, accounts, etc.
test test library for test purposes
If you reinstall, data directory has not changed, then before the library still exists
