1.配置yum包
yum search libaio yum install -y libaio
2.清理原环境
rpm -qa|grep -i mariadb* yum remove -y mariadb*
3.创建用户
groupadd mysql useradd -r -g mysql -s /bin/false mysql
4.解压，创建目录
cd /mysql_dir/ tar xvf mysql-8.0.23-linux-glibc2.12-x86_64.tar.xz ln -s mysql-8.0.23-linux-glibc2.12-x86_64 mysql cd .. mkdir data chown mysql:mysql data chmod 750 data
5.配置环境变量
# .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/bin:/mysql_dir/mysq8/mysql/bin ===>修改 export PATH
6.配置文件
cd /mysql_dir/mysql vi /etc/my.cnf [mysqld] server-id=8 datadir=/mysql_dir/data socket=/tmp/mysql.sock user=mysql log-bin=/mysql_dir/data/mysql-bin.log log-bin-index=/mysql_dir/data/mysql-bin.index [mysqld_safe] log-error=/mysql_dir/data/mysqld.log pid-file=/mysql_dir/data/mysqld.pid [mysql] prompt="\\u@\\h:\\p [\\d]>"
7.初始化（这个过程，会生成mysql的系统文件和临时密码，需要使用该密码登录，修改密码）
mysqld --initialize --user=mysql
8.启动mysql，并登陆修改密码
mysqld_safe --user=mysql & alter user ‘root‘@‘localhost‘ identified by ‘mysql123‘; mysql -uroot -pmysql123
追加：用户密码添加至配置文件，可以实现免密登录
[client] host=localhost user=root password=mysql123