1.安装
1.查看yum列表，发现没有mysql
[root@server-mysql src]# yum list mysql
已加载插件：fastestmirror
Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
Loading mirror speeds from cached hostfile
* base: centos.ustc.edu.cn
* extras: centos.ustc.edu.cn
* updates: centos.ustc.edu.cn
错误：没有匹配的软件包可以列出
2.使用wget下载一个mysql的repo源
[root@server-mysql src]# wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
-bash: wget: 未找到命令
3.发现wget也没有，那就安装一个wget
[root@server-mysql src]# yum list wget
已加载插件：fastestmirror
Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
Loading mirror speeds from cached hostfile
* base: centos.ustc.edu.cn
* extras: centos.ustc.edu.cn
* updates: centos.ustc.edu.cn
可安装的软件包
wget.x86_64 1.14-15.el7_4.1 base
[root@server-mysql src]# yum -y install wget.x86_64
......
依赖关系解决
========================================================================================
Package 架构 版本 源 大小
========================================================================================
正在安装:
wget x86_64 1.14-15.el7_4.1 base 547 k
事务概要
========================================================================================
安装 1 软件包
总下载量：547 k
安装大小：2.0 M
Downloading packages:
wget-1.14-15.el7_4.1.x86_64.rpm | 547 kB 00:00:10
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在安装 : wget-1.14-15.el7_4.1.x86_64 1/1
验证中 : wget-1.14-15.el7_4.1.x86_64 1/1
已安装:
wget.x86_64 0:1.14-15.el7_4.1
完毕！
4.在次下载mysql的repo源
[root@server-mysql src]# wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
--2018-09-08 14:45:20-- http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
正在解析主机 repo.mysql.com (repo.mysql.com)... 104.124.241.153
正在连接 repo.mysql.com (repo.mysql.com)|104.124.241.153|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：6140 (6.0K) [application/x-redhat-package-manager]
正在保存至: “mysql-community-release-el7-5.noarch.rpm”
100%[========================================================>] 6,140 --.-K/s 用时 0.001s
2018-09-08 14:45:20 (8.39 MB/s) - 已保存 “mysql-community-release-el7-5.noarch.rpm” [6140/6140])
5.用命令查看当前目录，已经下载好了
[root@server-mysql src]# ll | grep mysql
-rw-r--r--. 1 root root 6140 11月 12 2015 mysql-community-release-el7-5.noarch.rpm
6.安装一下
[root@server-mysql src]# rpm -ivh mysql-community-release-el7-5.noarch.rpm
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-release-el7-5 ################################# [100%]
7.再次查看yum列表，发现已经有mysql的包了
[root@server-mysql src]# yum list mysql
已加载插件：fastestmirror
mysql-connectors-community | 2.5 kB 00:00:00
mysql-tools-community | 2.5 kB 00:00:00
mysql56-community | 2.5 kB 00:00:00
(1/3): mysql-connectors-community/x86_64/primary_db | 26 kB 00:00:00
(2/3): mysql-tools-community/x86_64/primary_db | 45 kB 00:00:00
8.执行安装(会替换自带的mariadb库)
[root@server-mysql src]# yum -y install mysql-server
已加载插件：fastestmirror
.......
已安装:
mysql-community-libs.x86_64 0:5.6.41-2.el7 mysql-community-server.x86_64 0:5.6.41-2.el7
作为依赖被安装:
mysql-community-client.x86_64 0:5.6.41-2.el7 mysql-community-common.x86_64 0:5.6.41-2.el7 net-tools.x86_64 0:2.0-0.22.20131004git.el7
perl-Compress-Raw-Bzip2.x86_64 0:2.061-3.el7 perl-Compress-Raw-Zlib.x86_64 1:2.061-4.el7 perl-DBI.x86_64 0:1.627-4.el7
perl-Data-Dumper.x86_64 0:2.145-3.el7 perl-IO-Compress.noarch 0:2.061-2.el7 perl-Net-Daemon.noarch 0:0.48-5.el7
perl-PlRPC.noarch 0:0.2020-14.el7
替代:
mariadb-libs.x86_64 1:5.5.56-2.el7
完毕！
2.初始化
1.尝试进入mysql， 报错了，是没有权限
[root@server-mysql src]# mysql -u root
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
2.查看mysql所属的用户，发现是mysql
[root@server-mysql src]# ll /var/lib/ | grep mysql
drwxr-xr-x. 2 mysql mysql 6 6月 15 21:36 mysql
drwxr-x---. 2 mysql mysql 6 6月 15 21:36 mysql-files
3.将其更改为当前用户(root)
[root@server-mysql src]# chown -R root:root /var/lib/mysql*
[root@server-mysql src]# ll /var/lib/ | grep mysql
drwxr-xr-x. 2 root root 6 6月 15 21:36 mysql
drwxr-x---. 2 root root 6 6月 15 21:36 mysql-files
4.重启mysql
[root@server-mysql src]# systemctl restart mysqld
5.再次进入数据库，并查看已有数据库
[root@server-mysql src]# mysql -u root
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.41 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec)
3.设置/修改密码
方式一：
1.登陆到mysql中，将密码修改为root
mysql> set password for root@localhost = password('root');
Query OK, 0 rows affected (0.00 sec)
2.退出mysql
mysql> exit;
Bye
3.再次登陆需要使用密码登陆
[root@server-mysql src]# mysql -u root -p
Enter password: root
方式二：
1.登陆到mysql中，切换到mysql库
mysql> use mysql;
2.直接更新user表
mysql> update user set password=password('root') where user='root' and host='localhost';
3.刷新权限表
mysql> flush privileges;
方式三： 使用navicat修改，需要使用navicat连接上这个数据库，见文章最后有图示
4.修改远程连接权限
1.切换到mysql库
mysql> use mysql;
Database changed
2.查看用户和能连接的主机, 发现root用户只能在本机连接(host中地址都是代表本机)，不能远程用navicat连接
mysql> select user, host from user where user = 'root';
+------+--------------+
| user | host |
+------+--------------+
| root | 127.0.0.1 |
| root | ::1 |
| root | localhost |
| root | server-mysql |
+------+--------------+
4 rows in set (0.00 sec)
3.修改用户访问的地址
mysql> Grant all privileges on *.* to root@'%' identified by 'root' with grant option;
Query OK, 0 rows affected (0.00 sec)
说明：*.*指对数据的所有权限(增删改查), root指连接上来的用户名,
‘%’指所有外部ip地址都可以连接上来，如果要指定地址可以这样写 ‘100.100.100.100’,
identified by 后跟的是连接上来的密码
4.再次查看, 发现root用户多了一个主机地址（%）
mysql> select user, host from user where user = 'root';
+------+--------------+
| user | host |
+------+--------------+
| root | % |
| root | 127.0.0.1 |
| root | ::1 |
| root | localhost |
| root | server-mysql |
+------+--------------+
5 rows in set (0.00 sec)
5.刷新一下权限表
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
6.开放端口
[root@server-mysql src]# firewall-cmd --add-port=3306/tcp --permanent
success
[root@server-mysql src]# firewall-cmd --reload
success
5.使用navicat连接数据库
6.使用navicat修改用户密码
https://www.jianshu.com/p/c1ac5e732a44