CentOS7安装和配置MySQL5.7

查看yum是否安装过mysql
yum list installed mysql*

通过命令卸载:
yum remove mysql-community-client mysql-community-common mysql-community-libs mysql-community-libs-compat mysql-community-server mysql57-community-release
rm -rf /var/lib/mysql  
rm /etc/my.cnf

检查RPM包
rpm -qa | grep -i mysql

卸载RPM包:
rpm -e mysql57-community-release-el7-9.noarch
rpm -e mysql-community-server-5.7.17-1.el7.x86_64
rpm -e mysql-community-libs-5.7.17-1.el7.x86_64
rpm -e mysql-community-libs-compat-5.7.17-1.el7.x86_64
rpm -e mysql-community-common-5.7.17-1.el7.x86_64
rpm -e mysql-community-client-5.7.17-1.el7.x86_64

cd /var/lib/  
rm -rf mysql/


清除余项

whereis mysql
mysql: /usr/bin/mysql /usr/lib64/mysql /usr/local/mysql /usr/share/mysql /usr/share/man/man1/mysql.1.gz
#删除上面的文件夹
rm -rf /usr/bin/mysql

 

删除配置

rm –rf /usr/my.cnf
rm -rf /root/.mysql_sercret

剩余配置检查

chkconfig --list | grep -i mysql
chkconfig --del mysqld

根据上面的列表,删除 ,如:mysqld

 

如果有装MariaDB,参考同样方式卸载。

 

 

安装:

wget http://repo.mysql.com/mysql57-community-release-el7-10.noarch.rpm
sudo rpm -ivh mysql57-community-release-el7-10.noarch.rpm

接下来使用yum安装

 

更新yum软件包

yum check-update  
 

更新软件

yum update
 

 yum update 更新报错解决

当在CentOS 7中使用yum update更新软件时,可能会遇到如下错误信息:

Error: Delta RPMs disabled because /usr/bin/applydeltarpm not installed.

解决这个问题需要安装deltarpm,可以先通过如下命令查找该包的包名:

yum provides '*/applydeltarpm'

然后用如下命令安装即可解决:

yum install deltarpm

 

安装mysql

yum install mysql mysql-server

接下来是漫长的等待。如果中途关机,或者下载挂了,请执行卸载步骤后,再来一次。

完成后

给root上密码

 获取MySQL的临时密码

为了加强安全性,MySQL5.7为root用户随机生成了一个密码,在error log中,关于error log的位置,如果安装的是RPM包,则默认是/var/log/mysqld.log。 
只有启动过一次mysql才可以查看临时密码

   grep 'temporary password' /var/log/mysqld.log

```

[root@localhost etc]# grep 'temporary password' /var/log/mysqld.log
2019-01-10T01:58:42.323205Z 1 [Note] A temporary password is generated for root@localhost: de-cr(6g/_E=

```

所以临时密码为:de-cr(6g/_E=

使用临时密码登陆成功后,立刻修改密码

```

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

```

必须修改两个全局参数: 


首先,修改validate_password_policy参数的值

  

  mysql> set global validate_password_policy=0;

 

再修改密码的长度

  mysql> set global validate_password_length=1;

再次执行修改密码就可以了

  mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

 

初始化一个新库并给用户授权:

CREATE SCHEMA `xpy` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci ;

 

创建用户并授权:

grant all privileges on `xpy`.* to 'xpyopr'@'%' identified by 'xpy123456';

 

posted @ 2019-09-23 19:47  最爱番茄炒蛋  阅读(277)  评论(0编辑  收藏  举报