CentOS7 安装 Mysql 5.7,密码查看与修改
1、检测下系统有没有自带的mysql:yumlist installed | grep mysql, 如果已经有的话执行命令yum -y remove mysql-libs.x86_64卸载已经安装的mysql。 http://dev.mysql.com/downloads/mysql/2、先到mysql官网下载5.7.11的安装包,download-yum选择
1、检测下系统有没有自带的mysql:yum list installed | grep mysql,
如果已经有的话执行命令yum -y remove mysql-libs.x86_64卸载已经安装的mysql。
http://dev.mysql.com/downloads/mysql/
2、先到mysql官网下载5.7.11的安装包,download-yum选择Red Hat Enterprise linux 7 / Oracle Linux 7 (ArchitectureIndependent), RPM package ,
进入系统下载安装包:
#wget http://repo.mysql.com//mysql57-community-release-el7-7.noarch.rpm
如果新的系统还没有wget命令的话可以先:
#yum install wget
3、添加选择yum源:
#yum localinstallmysql57-community-release-el7-7.noarch.rpm Running transaction 正在安装 : mysql57-community-release-el7-7.noarch 1/1 验证中 : mysql57-community-release-el7-7.noarch 1/1 已安装: mysql57-community-release.noarch 0:el7-7 完毕! #yum repolist all | grep mysql mysql-connectors-community/x86_64 MySQL Connectors Community 启用: 21 mysql-connectors-community-source MySQL Connectors Community - Sourc 禁用 mysql-tools-community/x86_64 MySQL Tools Community 启用: 36 mysql-tools-community-source MySQL Tools Community - Source 禁用 mysql55-community/x86_64 MySQL 5.5 Community Server 禁用 mysql55-community-source MySQL 5.5 Community Server - Sourc 禁用 mysql56-community/x86_64 MySQL 5.6 Community Server 禁用 mysql56-community-source MySQL 5.6 Community Server - Sourc 禁用 mysql57-community/x86_64 MySQL 5.7 Community Server 启用: 110 mysql57-community-source MySQL 5.7 Community Server - Sourc 禁用
4、安装mysql:
#yum install mysql-community-server 已安装: mysql-community-libs.x86_64 0:5.7.14-1.el7 mysql-community-libs-compat.x86_64 0:5.7.14-1.el7 mysql-community-server.x86_64 0:5.7.14-1.el7 作为依赖被安装: mysql-community-client.x86_64 0:5.7.14-1.el7 mysql-community-common.x86_64 0:5.7.14-1.el7 替代: mariadb-libs.x86_64 1:5.5.44-2.el7.centos 完毕!
5、安装完成之后会自动在log中生成连接的密码,
启动mysql:
#systemctl start mysqld
查看密码:
[root@mysqlA ~]# cat /var/log/mysqld.log |grep password 2016-08-23T02:33:48.872073Z 1 [Note] A temporary password isgenerated for root@localhost: %IrczkB+J7Ez
你必须重新设置密码才能执行语句
[root@mysqlA ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. commands end with ; or \g. Your MySQL connection id is 4 Server version: 5.7.14 Copyright (c) 2000, 2016, 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; ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
其实想要重置 5.7 的密码很简单,就一层窗户纸:
1、修改/etc/my.cnf,在 [mysqld] 小节下添加一行:skip-grant-tables=1
这一行配置让 mysqld 启动时不对密码进行验证
2、重启mysqld 服务:systemctl restart mysqld
3、使用 root 用户登录到 mysql:mysql -uroot
4、切换到mysql数据库,更新 user 表:
update user set authentication_string = password('123456'),password_expired = 'N', password_last_changed = now() where user = 'root';
在之前的版本中,密码字段的字段名是 password,5.7版本改为了 authentication_string
5、退出 mysql,编辑 /etc/my.cnf 文件,删除 skip-grant-tables=1的内容
6、重启mysqld 服务,再用新密码登录即可
[root@mysqlA ~]# mysql -V mysql Ver 14.14 Distrib5.7.14, for Linux (x86_64) using EditLine wrapper
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