Linux操作系统基础（十三）：Linux安装、卸载MySQL
Linux操作系统基础（十三）：Linux安装、卸载MySQL
Linux安装、卸载MySQL
一、卸载系统自带的mariadb-lib
查看mariadb版本
rpm -qa | grep mariadb卸载mariadb
rpm -e mariadb-libs-5.5.56-2.el7.x86_64 --nodeps删除mariadb默认配置文件
rm -rf /etc/my.cnf重启机器
reboot二、上传安装包并解压
将mysql-8.0.18-1.el7.x86_64.rpm-bundle.tar安装包上传到/export/software目录
解压mysql安装包到/export/server目录
mkdir /export/server
tar -xvf mysql-8.0.18-1.el7.x86_64.rpm-bundle.tar -C /export/server三、按顺序安装
yum install numactl openssl-devel.x86_64 openssl.x86_64 autoconf perl.x86_64 perl-devel.x86_64 perl-JSON.noarch -y必须安装(注意顺序)
rpm -ivh mysql-community-common-8.0.18-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.18-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.0.18-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-8.0.18-1.el7.x86_64.rpm如何报以下错误：
错误1:
error:
Failed dependencies:
libnuma.so.1()(64bit) is needed by mysql-community-server-8.0.18-1.el7.x86_64 libnuma.so.1(libnuma_1.1)(64bit) is needed by mysql-community-server-8.0.18-1.el7.x86_64 libnuma.so.1(libnuma_1.2)(64bit) is needed by mysql-community-server-8.0.18-1.el7.x86_64
解决办法：
yum install numactl错误2:
出现问题：
error:
Failed dependencies:
pkgconfig(openssl) is needed by mysql-community-devel-8.0.18-1.el7.x86_64
解决办法：
yum install openssl-devel.x86_64 openssl.x86_64 -y错误3:
error:
Failed dependencies:
perl(Data::Dumper) is needed by mysql-community-test-8.0.18-1.el7.x86_64
解决办法：
yum -y install autoconf错误4:
error:
Failed dependencies:
perl(JSON) is needed by mysql-community-test-8.0.18-1.el7.x86_64
解决办法：
yum install perl.x86\_64 perl-devel.x86\_64 -y
yum install perl-JSON.noarch -y四、初始化数据库
mysqld --initialize --console五、目录授权，否则启动失败
chown -R mysql:mysql /var/lib/mysql/六、启动msyql服务
systemctl start mysqld将mysql服务设置为开机启动
systemctl enable mysqld
systemctl daemon-reload七、查看msyql服务的状态
service mysqld status八、在/var/log/mysqld.log下查看临时密码
cat /var/log/mysqld.log九、用临时密码登录到数据库
mysql -u root -p输入临时密码（输入时不会显示出来，输入完直接回车）
十、执行下列mysql命令 修改密码
alter USER 'root'@'localhost' IDENTIFIED BY '新密码';十一、依次执行下列mysql命令 授权远程连接
查看所有用户是否可以远程连接，依次执行下列命令：
show databases;
use mysql;
select host, user, authentication_string, plugin from user;host为localhsot，说明用户只能本地连接mysql服务
创建一个root@%账号，使root用户可以远程登录
开启mysql远程访问权限
use mysql;
create user 'root'@'%';
alter USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'root用户的密码';
flush privileges;