在centos7中使用yum安裝mysql資料庫並使用navicat連線
阿新 • • 發佈：2018-12-17
1.安裝
1.檢視yum列表，發現沒有mysql
[[email protected] src]# yum list mysql
已載入外掛：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 錯誤：沒有匹配的軟體包可以列出 2.使用wget下載一個mysql的repo源 [ 2.初始化
1.嘗試進入mysql， 報錯了，是沒有許可權
[[email protected] src]# mysql -u root
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
2.檢視mysql所屬的使用者，發現是mysql
[[email protected] 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.將其更改為當前使用者(root)
[[email protected] src]# chown -R root:root /var/lib/mysql*
[[email protected] 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.重啟mysql
[[email protected] src]# systemctl restart mysqld
5.再次進入資料庫，並檢視已有資料庫
[[email protected] 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.設定/修改密碼
方式一：
1.登陸到mysql中，將密碼修改為root
mysql> set password for [email protected] = password('root');
Query OK, 0 rows affected (0.00 sec)
2.退出mysql
mysql> exit;
Bye
3.再次登陸需要使用密碼登陸
[[email protected] src]# mysql -u root -p Enter password: root 方式二： 1.登陸到mysql中，切換到mysql庫 mysql> use mysql; 2.直接更新user表 mysql> update user set password=password('root') where user='root' and host='localhost'; 3.重新整理許可權表 mysql> flush privileges; 方式三： 使用navicat修改，需要使用navicat連線上這個資料庫，見文章最後有圖示 4.修改遠端連線許可權
1.切換到mysql庫
mysql> use mysql;
Database changed
2.檢視使用者和能連線的主機, 發現root使用者只能在本機連線(host中地址都是代表本機)，不能遠端用navicat連線
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.修改使用者訪問的地址 mysql> Grant all privileges on *.* to [email protected]'%' identified by 'root' with grant option; Query OK, 0 rows affected (0.00 sec) 說明：*.*指對資料的所有許可權(增刪改查), root指連線上來的使用者名稱, ‘%’指所有外部ip地址都可以連線上來，如果要指定地址可以這樣寫 ‘100.100.100.100’, identified by 後跟的是連線上來的密碼 4.再次檢視, 發現root使用者多了一個主機地址（%） 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.重新整理一下許可權表 mysql> flush privileges; Query OK, 0 rows affected (0.01 sec) 6.開放埠 [[email protected] src]# firewall-cmd --add-port=3306/tcp --permanent success [[email protected] src]# firewall-cmd --reload success 5.使用navicat連線資料庫
6.使用navicat修改使用者密碼
https://www.jianshu.com/p/c1ac5e732a44