CentOS下MySQL安装后配置和设置：
1：安装完成路径:
1、数据库目录 /var/lib/mysql/ 2、配置文件 /usr/share/mysql(mysql.server命令及配置文件) 3、启动脚本 /etc/rc.d/init.d/(启动脚本文件mysql的目录) 4、相关命令 /usr/bin(mysqladmin mysqldump等命令) 注:1~3安装server安装后存在,4mysqladmin mysqldump在client安装后存在
查看数据库版本：
mysql> select version(); +-----------+ | version() | +-----------+ | 5.6.27 | +-----------+ 1 row in set (0.00 sec)
2：启动mysql：
[root@localhost install-files]# service mysqld start Starting MySQL.. SUCCESS!
停止mysql:
[root@localhost init.d]# service mysqld stop Shutting down MySQL.. SUCCESS!
重启mysql：
[root@localhost init.d]# service mysqld restart Shutting down MySQL.. SUCCESS! Starting MySQL. SUCCESS!
注：启动脚本名称修改：
[root@localhost ~]# cd /etc/rc.d/init.d/ [root@localhost init.d]# ls functions mysql netconsole network README [root@localhost init.d]# mv mysql mysqld [root@localhost init.d]# ls functions mysqld netconsole network README
3：查看是否启动成功，进程mysql启动，网络端口3306开启为ok.：
[root@Tony_ts_tian ~]# ps aux | grep mysql root 28992 0.0 0.1 11340 1384 pts/0 S 15:02 0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/Tony_ts_tian.pid mysql 29095 0.0 44.7 1014444 455420 pts/0 Sl 15:02 0:04 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/Tony_ts_tian.err --pid-file=/var/lib/mysql/Tony_ts_tian.pid root 29165 0.0 0.0 103252 836 pts/0 S+ 17:04 0:00 grep mysql [root@Tony_ts_tian ~]# netstat -ntl Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:6379 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:8081 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:8006 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:3690 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:8010 0.0.0.0:* LISTEN
4：设置MySQL开机启动:
查看开机启动项:
[root@Tony_ts_tian ~]# chkconfig
查看是否有MySQL开机启动：
[root@Tony_ts_tian ~]# chkconfig --list | grep mysql*
设置开机启动：
[root@Tony_ts_tian ~]# chkconfig --add mysqld
或开启和关闭：chkconfig mysqld on / chkconfig mysqld off
设置效果：
[root@Tony_ts_tian ~]# chkconfig --list | grep mysql* mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off
以上表示设置成功。
注：rpm安装后初始密码在/root/.mysql_secret
5：创建管理员root密码：
注：第一次安装完mysql后,不需要输入密码，直接mysql命令，就可以登陆！5.1.
[root@Tony_ts_tian bin]# mysql -V
mysql Ver 14.14 Distrib 5.1.73, for redhat-linux-gnu (x86_64) using readline 5.1
[root@Tony_ts_tian bin]# pwd /usr/bin [root@Tony_ts_tian bin]# mysqladmin -u root password 'kaka123'
6：登录：
mysql -u root -p
Enter password: 不回显，输入正确密码enter即可登陆。
（7：忘记密码）：第5步可能也会出错:第9步也会出错：
即可，登录，修改密码。
注：也可使用：/etc/mysql/debian.cnf文件中[client]下配置的密码。
8：查看MySQL中all user：
查看数据库中所有用户：
mysql> SELECT DISTINCT CONCAT('User: ''',user,'''@''',host,''';') AS query FROM mysql.user;
+--------------------------------+
| query |
+--------------------------------+
| User: 'root'@'127.0.0.1'; |
| User: 'root'@'::1'; |
| User: 'root'@'localhost'; |
| User: 'root'@'tony\_ts\_tian'; |
+--------------------------------+
4 rows in set (0.00 sec)
9：允许远程机器用root用户连接MySQL服务器数据库：
a：查看表结构，插入一列,用户名User=root，Host='%'，表示不限制ip为允许所有ip访问，密码：
mysql> DESC user;
发现mysql数据库下user表中，Host和User为主键列。(SQL来自备份user表)，设置登录的Host为所有：
INSERT INTO `user`(`Host`,`User`,`Password`,`Select_priv`,`Insert_priv`,`Update_priv`,`Delete_priv`,`Create_priv`,`Drop_priv`,`Reload_priv`,`Shutdown_priv`,`Process_priv`,`File_priv`,`Grant_priv`,`References_priv`,`Index_priv`,`Alter_priv`,`Show_db_priv`,`Super_priv`,`Create_tmp_table_priv`,`Lock_tables_priv`,`Execute_priv`,`Repl_slave_priv`,`Repl_client_priv`,`Create_view_priv`,`Show_view_priv`,`Create_routine_priv`,`Alter_routine_priv`,`Create_user_priv`,`Event_priv`,`Trigger_priv`,`Create_tablespace_priv`,`ssl_type`,`ssl_cipher`,`x509_issuer`,`x509_subject`,`max_questions`,`max_updates`,`max_connections`,`max_user_connections`,`plugin`,`authentication_string`,`password_expired`) VALUES ('%','root','*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','','N');
修改登录密码:
mysql> SELECT Host,User,Password FROM `user`;
mysql> UPDATE `user` SET password='*71ABCA8B06D46066CEF8062A75256E66243D0FC8' WHERE Host='%' AND User='root';
mysql> SELECT DISTINCT CONCAT('User: ''',user,'''@''',host,''';') AS query FROM mysql.user;
+--------------------------------+
| query |
+--------------------------------+
| User: 'root'@'%'; |
| User: 'root'@'127.0.0.1'; |
| User: 'root'@'::1'; |
| User: 'root'@'localhost'; |
| User: 'root'@'tony\_ts\_tian'; |
+--------------------------------+
5 rows in set (0.00 sec)
b：或者直接更新，重启：
mysql> UPDATE USER SET HOST = '%' WHERE HOST='127.0.0.1' AND USER='root'
a，b后，刷新MySQL的系统权限相关表：
mysql> flush privileges;
重启，就可以远程访问了：
[root@Tony_ts_tian bin]# service mysqld restart Shutting down MySQL.... SUCCESS! Starting MySQL. SUCCESS!
登陆mysql数据库：
[root@Tony_ts_tian ~]# mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 149 Server version: 5.6.27 MySQL Community Server (GPL) Copyright (c) 2000, 2015, 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>
