安装MySQL版本为：8.0.16
1、首次安装，下载命令：
wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz
2、解压
tar xvJf mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz
3.重命名
mv mysql-8.0.20-linux-glibc2.12-x86_64 mysql-8.0
4.创建用户组、用户及其密码
groupadd mysql
useradd -g mysql mysql
6、授权
chown -R mysql.mysql /usr/local/mysql/mysql-8.0
chmod 750 /usr/local/mysql/mysql-8.0/data -R
7、在 /etc/profile 中添加环境变量 并执行 source /etc/profile
export PATH =$PATH:/usr/local/mysql/mysql-8.0/bin:/usr/local/mysql/mysql-8.0/lib
8、配置 /etc/my.cnf
[mysql]
default-character-set=utf8mb4
[client]
#port=3306
socket=/var/lib/mysql/mysql.sock
[mysqld]
#port=3306
#server-id=3306
user=mysql
general_log = 1
general_log_file= /var/log/mysql/mysql.log
socket=/var/lib/mysql/mysql.sock
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
log-bin=/usr/local/mysql/data/mysql-bin
innodb_data_home_dir=/usr/local/mysql/data
innodb_log_group_home_dir=/usr/local/mysql/data/
character-set-server=utf8mb4
lower_case_table_names=1
autocommit=1
default_authentication_plugin=mysql_native_password
symbolic-links=0
Disabling symbolic-links is recommended to prevent assorted security risks
Settings user and group are ignored when systemd is used.
If you need to run mysqld under a different user or group,
customize your systemd unit file for mariadb according to the
instructions in http://fedoraproject.org/wiki/Systemd
[mysqld_safe]
log-error=/usr/local/mysql/data/mysql.log
pid-file=/usr/local/mysql/data/mysql.pid
9、在/usr/local/mysql/mysql-8.0/bin目录下执行 执行初始化指令
./mysqld –user =mysql –basedir =/usr/local/mysql/mysql-8.0 –datadir =/usr/local/mysql//mysql-8.0/data/ –initialize
操作成功后会给出临时密码：%8s/H*uB!(ed
10、进入/usr/local/mysql/mysql-8.0目录 复制mysql执行文件 并赋予权限
cp -a ./support-files/mysql.server /etc/init.d/mysql
cp -a ./support-files/mysql.server /etc/init.d/mysqld
授权
chown 777 /etc/my.cnf
chmod +x /etc/init.d/mysql
chmod +x /etc/init.d/mysqld
11、创建文件夹 mkdir /var/lib/mysql 并授权
chown -R mysql:mysql /var/lib/mysql/
12、启动MySQL
service mysql start
SUCCESS 则表示成功
13、用户登录
mysql -uroot -p
此时输入 初始化操作给出的密码就可以登录了
password：%8s/H*uB!(ed （这里输入之前保存的临时密码即可）
14、修改密码
ALTER USER ‘root’@’localhost’ IDENTIFIED WITH mysql_native_password BY ‘新密码’;
flush privileges;#刷新权限
15、设置远程连接
use mysql; # 选择数据库
mysql> create user ‘root’@’%’ identified by ‘password’;
mysql> grant all privileges on . to ‘root’@’%’ with grant option;
mysql> flush privileges;
16、到这里，整个安装过程结束。
***遇到的问题
1、权限问题
解决方法：chown mysql:mysql /var/log/mysql/mysql.log
2、data文件夹已存在 删掉data文件夹即可 初始化时自动创建
3、MySQL登录
这里需要输入，之前保存的临时密码，其他任何值都会报错！
Original: https://www.cnblogs.com/zy-connect/p/16722726.html
Author: 白驹过隙_只争朝夕
Title: Linux系统安装Mysql8.0流程与遇到的问题
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