CentOS 7通过yum安装MySQL数据库例子

在CentOS 7中使用yum list mysql*，没有可以安装的MySQL版本，CentOS 7中默认使用的数据库是MariaDB，关于MariaDB，它是MySQL的一个分支，MySQL被Oracle收购有闭源的风险，因此有了一个MariaDB分支，兼容MySQL，下面是CentOS 7下通过yum安装MySQL的方式。

我们先要下载 Yum Repo package of MySQL Server 5.6

yum install wget
wget http://repo.*m*ys*ql.com/mysql-community-release-el7-5.noarch.rpm

Install mysql-community-release-el7-5.noarch.rpm package

Install this downloaded rpm package by using rpm command.

rpm -ivh mysql-community-release-el7-5.noarch.rpm

After the installation of this package. We will get two new yum repo related to MySQL

[root@localhost ~]# ls -1 /etc/yum.repos.d/mysql-community*
/etc/yum.repos.d/mysql-community.repo
/etc/yum.repos.d/mysql-community-source.repo
[root@localhost ~]#

Installing MySQL Server

By using yum command, now we will install MySQL Server 5.6 . All dependencies will be installed itself.

yum install mysql-server
How to start/stop/restart MySQL Server

Now MySQL Server is installed on your system.

To start MySQL Service, run command

systemctl start mysqld

To stop MySQL Service, run command

systemctl stop mysqld

To restart MySQL Service, run command

systemctl restart mysqld

To get status of MySQL Service, run command

systemctl status mysqld

Reset MySQL root password

On fresh installation of MySQL Server. The MySQL root user password is blank.
For good security practice, we should reset the password MySQL root user.

On newly installed MySQL Server, we generally recommend to use the command script. You have to just follow the instructions.

mysql_secure_installation
In another method,you can log into MySQL server database and reset the password in secure way.

mysql -u root

You will see mysql prompt like this mysql> . Use the below given commands to reset root’s password.

mysql> use mysql;
mysql> update user set password=PASSWORD("GIVE-NEW-ROOT-PASSWORD") where User='root';
mysql> flush privileges;
mysql> quit