注意:本次安装目录为/opt/module/ ###下载mysql安装包 [root@chenxi module]# wget https://downloads.mysql.com/archives/get/p/23/file/mysql-8.0.18-linux-glibc2.12-x86_64.tar.xz ###解压安装包 [root@chenxi module]# tar -xf mysql-8.0.18-linux-glibc2.12-x86_64.tar.xz [root@chenxi module]# mv mysql-8.0.18-linux-glibc2.12-x86_64 mysql ###在/etc目录下创建my.cnf初始文件插入以下并保存 [root@chenxi module]# vim /etc/my.cnf [mysqld] # 设置3306端口 port=3306 # 设置mysql的安装目录 basedir=/opt/module/mysql # 设置mysql数据库的数据的存放目录 datadir=/opt/module/mysql/data # 允许最大连接数 max_connections=10000 # 允许连接失败的次数。这是为了防止有人从该主机试图攻击数据库系统 max_connect_errors=10 # 服务端使用的字符集默认为UTF8MB4 # 搭建时使用UTF8报出警告如下: # --character-set-server: 'utf8' is currently an alias for the character # set UTF8MB3, but will be an alias for UTF8MB4 in a future release. # Please consider using UTF8MB4 in order to be unambiguous character-set-server=UTF8MB4 # 创建新表时将使用的默认存储引擎 default-storage-engine=INNODB # 默认使用“mysql_native_password”插件认证 default_authentication_plugin=mysql_native_password [mysql] # 设置mysql客户端默认字符集 default-character-set=UTF8MB4 [client] # 设置mysql客户端连接服务端时默认使用的端口 port=3306 default-character-set=UTF8MB4 ###初始化mysql [root@chenxi module]# /opt/module/mysql/bin/mysqld --initialize --user=mysqluser --basedir=/opt/module/mysql/ --datadir=/opt/module/mysql/data/ ###暂且保留好密码:root@localhost: dj91/8JC%k=Z ###创建用户组和用户并赋予mysql文件夹操作权限 [root@chenxi module]# groupadd mysqlgroup [root@chenxi module]# useradd mysqluser [root@chenxi module]# chown -R mysqluser:mysqlgroup /opt/module/mysql ###把启动命令加入到系统服务service管理并授权 [root@chenxi module]# cp support-files/mysql.server /etc/init.d/mysqld [root@chenxi module]# chmod 755 /etc/init.d/mysqld ###切换用户启动 [root@chenxi module]# su mysqluser ###注意:切换用户,如不切换用户启动会报如下错误:(大坑) [mysqluser@chenxi module]# service mysqld start ###进入mysql(/opt/module/mysql/bin/mysql为mysql安装目录下的bin/mysql) [mysqluser@chenxi module]# /opt/module/mysql/bin/mysql -uroot -p dj91/8JC%k=Z ###修改当前用户密码、创建新用户并授权、刷新缓存 mysql> alter user user() identified by '密码'; mysql> create user '用户名'@'%' identified by '密码'; mysql> grant all privileges on *.* to '用户名'@'%' with grant option; mysql> flush privileges;