标签：账号   dev   red   安装mysql   14.   for   end   --   other   

前言

安装mysql

mysql的安装可以用yum安装更方便

[root@yoyo ~]# cd /usr/local/
[root@yoyo ~]# mkdir mysql-community-release
[root@yoyo ~]# cd mysql-community-release
[root@yoyo ~]# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
[root@yoyo ~]# rpm -ivh mysql-community-release-el7-5.noarch.rpm
[root@yoyo ~]# yum -y install mysql-community-server

安装完成后查看版本号：mysql -V

[root@yoyo local]# mysql -V
mysql  Ver 14.14 Distrib 5.6.42, for Linux (x86_64) using  EditLine wrapper

安装完成后重启mysql服务,查看状态是Active: activating，说明启动成功

[root@yoyo local]# service mysqld restart
Redirecting to /bin/systemctl restart mysqld.service
Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.

[root@yoyo local]# systemctl status  mysql.service
● mysqld.service - MySQL Community Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: activating (auto-restart) (Result: exit-code) since Mon 2019-01-14 19:41:59 CST; 31ms ago
  Process: 20074 ExecStartPost=/usr/bin/mysql-systemd-start post (code=exited, status=0/SUCCESS)
  Process: 20073 ExecStart=/usr/bin/mysqld_safe --basedir=/usr (code=exited, status=1/FAILURE)
  Process: 20060 ExecStartPre=/usr/bin/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
 Main PID: 20073 (code=exited, status=1/FAILURE)

Jan 14 19:41:59 yoyo systemd[1]: Failed to start MySQL Community Server.
Jan 14 19:41:59 yoyo systemd[1]: Unit mysqld.service entered failed state.
Jan 14 19:41:59 yoyo systemd[1]: mysqld.service failed.
[root@yoyo local]# 

mysql重置密码

方法一：
初次安装使用mysql，root账户默认是没设置密码的，系统会给个临时密码，在/var/log/mysqld.log可以查看

[root@yoyo local]# grep ‘temporary password‘ /var/log/mysqld.log

如下图所示，出现的就是临时密码，复制出来就可以登录mysql了

[root@yoyo local]# mysql -u root -p

看到Enter password: 输入密码，exit退出mysql

[root@yoyo local]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 26
Server version: 5.6.42 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> exit
Bye
[root@yoyo local]# 

方法二：
要是上一步找不到临时密码，那就用此方法，先停掉mysql，以安全方式启动

[root@yoyo local]# systemctl stop mysql.service

以安全方式启动mysql:

[root@yoyo local]# /usr/bin/mysqld_safe --skip-grant-tables >/dev/null 2>&1 &

然后执行

[root@yoyo local]# /usr/bin/mysql -u root mysql

出现“mysql>”提示符后输入：

mysql> update user set password = Password('root') where User = 'root';
回车后执行（刷新MySQL系统权限相关的表）：
mysql> flush privileges;
再执行exit退出：
mysql> exit;

退出后，使用以下命令登陆mysql，试试是否成功：

[root@yoyo local]#mysql -u root -p

按提示输入密码：root

[root@yoyo local]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 27
Server version: 5.6.42 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> 

出现Welcome to the MySQL那就是登录成功了

查看mysql端口号

mysql默认端口是3306，如何查看msyql端口号呢？可以用root账号登录后，执行show variables like ‘port‘;

[root@yoyo local]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 33
Server version: 5.6.42 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 variables like 'port';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+
1 row in set (0.00 sec)

mysql> 

mysql远程连接

mysql在linux上安装完成后，为了方便的查看，可以在本地电脑上安装一个远程连接数据库的客户端，远程连上mysql

mysql>create user 'username'@'%' identified by 'password';  

Linux学习16-CentOS安装mysql5.6环境

标签：账号   dev   red   安装mysql   14.   for   end   --   other   

原文地址：https://www.cnblogs.com/yoyoketang/p/10268896.html