linux 安装 marinDB

1、安装MariaDB
安装命令
yum -y install mariadb mariadb-server 
-- 仅下载
yum -y install mariadb mariadb-server  --downloadonly --downloaddir=/down

-- 手动安装
rpm -Uvih *.rpm

安装完成MariaDB，首先启动MariaDB
systemctl start mariadb
设置开机启动
systemctl enable mariadb
初次运行，直接回车
mysql -uroot -p
设置密码为 ‘123’
use mysql;
update user set password=password("123")where user='root';
 flush privileges;
quit;
退出进入重新进入；
mysql -uroot -p
mysql开放远程连接权限


-- 开放远程登录权限
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;
-- 刷新权限
FLUSH PRIVILEGES;

2.端口开放
2.1安装netstat工具
yum install net-tools
2.2防火墙操作

firewall-cmd --zone=public --add-port=80/tcp --permanent   （--permanent永久生效，没有此参数重启后失效）

service firewalld restart

3、配置MariaDB的字符集
文件/etc/my.cnf
vi /etc/my.cnf
在[mysqld]标签下添加
init_connect='SET collation_connection = utf8_unicode_ci' 
init_connect='SET NAMES utf8' 
character-set-server=utf8
collation-server=utf8_unicode_ci
skip-character-set-client-handshake
文件/etc/my.cnf.d/client.cnf
vi /etc/my.cnf.d/client.cnf
在[client]中添加
default-character-set=utf8
文件/etc/my.cnf.d/mysql-clients.cnf
vi /etc/my.cnf.d/mysql-clients.cnf
在[mysql]中添加
default-character-set=utf8
 全部配置完成，重启mariadb
systemctl restart mariadb
之后进入MariaDB查看字符集
mysql> show variables like "%character%";show variables like "%collation%";
显示为


+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client    | utf8                      |
| character_set_connection | utf8                      |
| character_set_database  | utf8                      |
| character_set_filesystem | binary                    |
| character_set_results    | utf8                      |
| character_set_server    | utf8                      |
| character_set_system    | utf8                      |
| character_sets_dir      | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)


+----------------------+-----------------+
| Variable_name        | Value          |
+----------------------+-----------------+
| collation_connection | utf8_unicode_ci |
| collation_database  | utf8_unicode_ci |
| collation_server    | utf8_unicode_ci |
+----------------------+-----------------+
3 rows in set (0.00 sec)

字符集配置完成。
 
4、添加用户，设置权限
创建用户命令
mysql>create user root@localhost identified by '123';
直接创建用户并授权的命令
mysql>grant all on *.* to root@localhost indentified by '123';
授予外网登陆权限 
mysql>grant all privileges on *.* to root@'%' identified by '123';
授予权限并且可以授权
mysql>grant all privileges on *.* to root@'hostname' identified by 'password' with grant option;
简单的用户和权限配置基本就这样了。


grant all privileges on *.* to 'root'@'%' with grant option;