mysql数据库安装和配置
mysql数据库安装和配置
1.配置YUM源
# 下载mysql源安装包
shell> wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
# 安装mysql源
shell> yum localinstall mysql57-community-release-el7-8.noarch.rpm
2.安装MySQL
shell> yum install mysql-community-server
3.启动MySQL服务
shell> systemctl start mysqld
4.查看MySQL的启动状态
shell> systemctl status mysqld
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled)
Active: active (running) since 五 2016-06-24 04:37:37 CST; 35min ago
Main PID: 2888 (mysqld)
CGroup: /system.slice/mysqld.service
└─2888 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid
6月 24 04:37:36 localhost.localdomain systemd[1]: Starting MySQL Server...
6月 24 04:37:37 localhost.localdomain systemd[1]: Started MySQL Server.
5.开机启动
shell> systemctl enable mysqld
shell> systemctl daemon-reload
6.修改密码策略
在/etc/my.cnf文件添加validate_password_policy配置,指定密码策略
# 选择0(LOW),1(MEDIUM),2(STRONG)其中一种,选择2需要提供密码字典文件
validate_password_policy=0
如果不需要密码策略,添加my.cnf文件中添加如下配置禁用即可
validate_password = off
重新启动mysql服务使配置生效
systemctl restart mysqld
7.修改root默认密码
mysql安装完成之后,在/var/log/mysqld.log文件中给root生成了一个默认密码。
通过下面的方式找到root默认密码,然后登录mysql进行修改:
shell> grep 'temporary password' /var/log/mysqld.log
shell> mysql -uroot -p
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'password';
8.配置默认编码为utf8
[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'
9.添加远程登录用户
把在所有数据库的所有表的所有权限赋值给位于所有IP地址的root用户
mysql> grant all privileges on *.* to [email protected]'%'identified by 'password';
如果是新用户而不是root,则要先新建用户
mysql>create user 'username'@'%' identified by 'password';
此时就可以进行远程连接了。
10.默认配置文件路径
配置文件:/etc/my.cnf
日志文件:/var/log//var/log/mysqld.log
服务启动脚本:/usr/lib/systemd/system/mysqld.service
socket文件:/var/run/mysqld/mysqld.pid
11.常用命令
systemctl start mysqld 启动 MySQL Server
systemctl status mysqld 查看 MySQL Server 状态
systemctl stop mysqld 关闭 MySQL Server
卸载Mysql
-
卸载掉安装的部分
首先执行查看命令,看一下都安转了什么东东:rpm -qa |grep -i mysql
-
开始卸载
执行卸载命令:yum remove mysql-community mysql-community-server mysql-community-libs mysql-community-common
-
检查卸载残余
检查是否卸载干净:rpm -qa |grep -i mysql
-
卸载残余
卸载掉刚才未卸载掉的部分:yum remove mysql-community-release
-
终极检查
再进行一遍检查:rpm -qa |grep -i mysql
,安装部分已完全卸载掉。 -
清理文件
查看mysql文件目录:find / -name mysql
. -
删除掉该文件:
rm -rf /usr/share/mysql
。
转载于:https://my.oschina.net/gibbons/blog/890939