Ubuntu中使用apt-get进行软件包管理：
安装：apt-get install name
更新：apt-get update name
卸载：apt-get remove name
查找：apt-cache search name
通过apt 安装MySQL会安装最新版
第一步：更新源
命令： sudo apt-get update
第二步：安装mysql服务
命令： sudo apt-get install mysql-server
第三步：初始化配置
命令： sudo mysql_secure_installation
配置项较多，如下所示：
1
VALIDATE PASSWORD PLUGIN can be used to test passwords…
Press y|Y for Yes, any other key for No: N (选择N ,不会进行密码的强校验)
2
Please set the password for root here…
New password: (输入密码)
Re-enter new password: (重复输入)
3
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…
Remove anonymous users? (Press y|Y for Yes, any other key for No) : Y (选择Y，删除匿名用户)
4
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? (Press y|Y for Yes, any other key for No) : N (选择N，允许root远程连接)
5
By default, MySQL comes with a database named ‘test’ that
anyone can access…
Remove test database and access to it? (Press y|Y for Yes, any other key for No) : N (选择N，不删除test数据库)
6
Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.
Reload privilege tables now? (Press y|Y for Yes, any other key for No) : Y (选择Y，修改权限立即生效)
第四步：检查mysql服务状态
systemctl status mysql.service
第五步：配置远程访问
1.配置 bind-address
在Ubuntu下MySQL缺省是只允许本地访问的，使用workbench连接工具是连不上的；
如果你要其他机器也能够访问的话，需要进行配置；找到 bind-address 修改值为 0.0.0.0(如果需要远程访问)
命令：
sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf
#找到 bind-address 修改值为 0.0.0.0(如果需要远程访问)
重启mysql命令：sudo /etc/init.d/mysql restart
2.登录MySQL
命令：sudo mysql -uroot -p
输入用户密码
3.切换数据库
命令：mysql>use mysql;
4.查询用户表命令：
命令：mysql>select User,authentication_string,Host from user;
5.查看状态
命令：select host,user,plugin from user;
6.设置权限与密码
命令：
mysql> ALTER USER ‘root’@‘localhost’ IDENTIFIED WITH mysql_native_password BY ‘密码’; #使用mysql_native_password修改加密规则
mysql> ALTER USER ‘root’@‘localhost’ IDENTIFIED BY ‘密码’ PASSWORD EXPIRE NEVER; #更新一下用户的密码
mysql> UPDATE user SET host = ‘%’ WHERE user = ‘root’; #允许远程访问
#刷新cache中配置 刷新权限
mysql>flush privileges;
mysql>quit;
第六步：开放端口
命令：
sudo iptables -A INPUT -p tcp —dport 3306 -j ACCEPT
sudo iptables -A OUTPUT -p tcp —sport 3306 -j ACCEPT
附：删除MySQL
1.在终端中查看MySQL的依赖项：dpkg —list|grep mysql
2.执行具体删除命令
命令：sudo apt-get remove XXXXX
其中 XXXXX分别为上图红色方块中的内容，比如：
sudo apt-get remove mysql-common
3.查看MySQL的剩余依赖项
命令：dpkg —list|grep mysql
4.继续删除剩余依赖项
命令：sudo apt-get autoremove —purge xxxx
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