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CentOS 安装 MySQL

CentOS 安装 MySQL

作者: peng13 | 来源:发表于2017-12-23 21:47 被阅读0次

    注:文中所写的安装过程均在CentOS-6.5-x86_64-minimal下通过测试
    Hyper -v 安装CentOS 参考 https://www.jianshu.com/p/c55795bb1f38

    1.检测系统是否已经安装过mysql或其依赖,若已装过要先将其删除,否则第4步使用yum安装时会报错:

    
    1 # yum list installed |grep mysql
    
    2 mysql-libs.i6865.1.71-1.el6 @anaconda-CentOS-201311271240.i386/6.5
    
    3 # yum -y remove mysql-libs.i686
    
    

    2.从mysql的官网下载mysql57-community-release-el6-5.noarch.rpm(注意这里的el6-5即适配RHEL6.5的版本,如果下载了其它版本后面的安装过程中可能会报错):

    
    wget dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm
    
    

    3.安装第一步下载的rpm文件:

    
    yum install mysql-community-release-el6-5.noarch.rpm
    
    

    安装成功后,我们可以看到/etc/yum.repos.d/目录下增加了以下两个文件

    
    1 # ls /etc/yum.repos.d 
    
    2 mysql-community-source.repo
    
    3 mysql-community.repo
    
    

    查看mysql57的安装源是否可用,如不可用请自行修改配置文件(/etc/yum.repos.d/mysql-community.repo)使mysql57下面的enable=1

    若有mysql其它版本的安装源可用,也请自行修改配置文件使其enable=0

    
    1 # yum repolist enabled | grep mysql
    
    2 mysql-connectors-community      MySQL Connectors Community                                   13
    
    3 mysql-tools-community           MySQL Tools Community                                        18
    
    4 mysql57-community-dmr           MySQL5.7Community Server Development Milesto                 65
    
    

    4.使用yum安装mysql:

    
    yum install mysql-community-server
    
    

    5.启动mysql服务:

    
    service mysqld start
    
    

    修改root 密码

    
    /usr/bin/mysqladmin -u root password 'new-password'
    
    

    6.查看mysqld是否开机自启动,并设置为开机自启动:

    
    1 chkconfig --list | grep mysqld
    
    2 chkconfig mysqld on
    
    

    7.修改字符集为UTF-8:

    
    vi /etc/my.cnf
    
    

    在[mysqld]部分添加:

    
    character_set_server=utf8
    
    

    在文件末尾新增[client]段,并在[client]段添加:

    
    default-character-set=utf8
    
    

    修改好之后重启mysqld服务:

    
    service mysqld restart
    
    

    查看修改结果:

    
    mysql> show variables like "%character%";
    
    +--------------------------+----------------------------+
    
    | Variable_name            | Value                      |
    
    +--------------------------+----------------------------+
    
    | character_set_client    | utf8                        |
    
    | character_set_connection | utf8                       |
    
    | character_set_database  | utf8                        |
    
    | character_set_filesystem | binary                     |
    
    | character_set_results    | utf8                       |
    
    | character_set_server    | utf8                        |
    
    | character_set_system    | utf8                        |
    
    | character_sets_dir      | /usr/share/mysql/charsets/  |
    
    +--------------------------+----------------------------+
    
    8 rows in set (0.00 sec)
    
    mysql> quit
    
    

    MySQL 安装结束。

    Linux安装MySQL,默认不允许远程登录。
    执行以下命令开启远程登录:

    1 # mysql -uroot -p
    Enter password: 
    2 mysql> use mysql;
    Reading table information for completion of table and column names
    You can turn off this feature to get a quicker startup with -A
    
    Database changed
    
    3 mysql> grant all privileges on *.* to 'root'@'%' identified by 'new-password' with grant option;  
    Query OK, 0 rows affected (0.00 sec)
    4 mysql> FLUSH PRIVILEGES;
    Query OK, 0 rows affected (0.00 sec)
    
    

    PS:如果还是报错检查一下防火墙是否开启了3306端口
    /etc/init.d/iptables status

    配置防火墙:
    vi /etc/sysconfig/iptables
    插入:
    -A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT

    添加好之后防火墙规则如下所示:


    image.png

    重启防火墙:

    开启防火墙(重启后永久生效):chkconfig iptables on
    
    关闭防火墙(重启后永久生效):chkconfig iptables off
    
    开启防火墙(即时生效,重启后失效):service iptables start
    
    关闭防火墙(即时生效,重启后失效):service iptables stop
    
    重启防火墙:service iptables restart
    

    Navicat for MySQL连接MySQL :

    image.png

    删除user表中user列为空数据:

    drop user ''@localhost
    drop user ''@localhost.localdomain
    

    主要参考博文:
    https://www.cnblogs.com/lzj0218/p/5724446.html
    http://blog.sina.com.cn/s/blog_544f18310102w8m0.html

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