2.安装MySQL5
首先我们需要先用下面的命令安装MySQL5：
yast2 -i mysql mysql-client mysql-community-server
然后我们需要创建MySQL系统的启动键链接启动MySQL服务器，这样以便于MySQL在系统启动时自动启动，
systemctl enable mysql.service
systemctl start mysql.service
为了确保MySQL的安装完成，运行：
mysql_secure_installation
下面会遇到下面的提示问题；
server1：~ # mysql_secure_installation
NOTE： RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE！ PLEASE READ EACH STEP CAREFULLY！
In order to log into MySQL to secure it， we'll need the current
password for the root user. If you've just installed MySQL， and
you haven't set the root password yet， the password will be blank，
so you should just press enter here.
Enter current password for root (enter for none)： <-- 输入密码
OK， successfully used password， moving on...
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
Set root password？ [Y/n] <-- 输入Y
New password： <-- 设置数据库密码
Re-enter new password： <-- 重新输入数据库密码
Password updated successfully！
Reloading privilege tables..
... Success！
By default， a MySQL installation has an anonymous user， allowing anyone
to log into MySQL without having to have a user account created for
them. This is intended only for testing， and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users？ [Y/n] <-- 选择Y
... Success！
Normally， root should only be allowed to connect from 'localhost'. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely？ [Y/n] <-- 选择Y
... Success！
By default， MySQL comes with a database named 'test' that anyone can
access. This is also intended only for testing， and should be removed
before moving into a production environment.
Remove test database and access to it？ [Y/n] <-- 选择Y
- Dropping test database...
... Success！
- Removing privileges on test database...
... Success！
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now？ [Y/n] <-- 选择Y
... Success！
Cleaning up...
All done！ If you've completed all of the above steps， your MySQL
installation should now be secure.
Thanks for using MySQL！
server1：~ #
现在你的MySQL安装应成功了
