CentOS7安装MySQL

2018-08-29  本文已影响0人  小嘚瑟l

1、先检查系统是否装有mysql

[root@localhost ~]# rpm -qa | grep mysql

[root@localhost ~]#(返回空值,说明没有安装)

2、下载mysql的repo源

[root@localhost ~]# wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

3、安装mysql-community-release-el7-5.noarch.rpm包

[root@localhost ~]# sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm

安装这个包后,会获得两个mysql的yum repo源:

/etc/yum.repos.d/mysql-community.repo,

/etc/yum.repos.d/mysql-community-source.repo。

可以输入命令查看:

[root@localhost ~]# cd /etc/yum.repos.d/

[root@localhost yum.repos.d]# ls

mysql-community-source.repo  mysql-community.repo

4、安装mysql

[root@localhost yum.repos.d]# sudo yum install mysql-server

Is this ok [y/d/N]: y(遇到选项输入y)

安装完成后,没有密码,需要重置密码

安装后再次查看mysql

[root@localhost yum.repos.d]# rpm -qa | grep mysql

mysql-community-client-5.6.41-2.el7.x86_64

mysql-community-common-5.6.41-2.el7.x86_64

mysql-community-release-el7-5.noarch

mysql-community-libs-5.6.41-2.el7.x86_64

mysql-community-server-5.6.41-2.el7.x86_64

5、重置密码

重置密码前,首先要登录

[root@localhost yum.repos.d]# mysql -u root

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

出现此错误:原因是/var/lib/mysql的访问权限问题。

下面的命令把/var/lib/mysql的拥有者改为当前用户:

[root@localhost /]# sudo chown -R openscanner:openscanner /var/lib/mysql

chown: 无效的用户: "openscanner:openscanner"

更换命令,并用 ll 查看目录权限列表

[root@localhost /]# chown root /var/lib/mysql/

重启服务

[root@localhost /]# service mysqld restart

登录重置密码

[root@localhost /]# mysql -u root

mysql> use mysql;

mysql> update user set password=password('root') where user='root';

mysql> exit;

重启mysql服务器才生效:

[root@localhost /]# service mysqld restart

加入以下命令行,为root添加远程连接的能力。链接密码为 root

mysql> GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "root";

6、开放3306端口号(centos7)

[root@localhost /]# firewall-cmd --zone=public --add-port=3306/tcp --permanent

[root@localhost /]# firewall-cmd --reload

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