MySQL8.0安装

为mysql创建用户组

[root@linux01 ~]# groupadd mysql

添加mysql用户

[root@linux01 ~]# useradd -r -g mysql mysql

创建目录
[root@linux01 ~]# mkdir -p /kingsql/database/mysql/tmp/
[root@linux01 ~]# mkdir -p /kingsql/database/mysql/log/

创建mysqld.log日志
[root@linux01 ~]# touch /kingsql/database/mysql/log/mysqld.log

将安装包移动到mysql目录下
[root@linux01 ~]# mv mysql8.0_kingsql.tar.gz /kingsql/database/mysql/
[root@linux01 ~]# cd /kingsql/database/mysql/

修改目录所属用户
[root@ogg02 ~]# chown mysql:mysql -R /kingsql

解压安装包
[root@linux01 mysql]# tar -zxvf mysql8.0_kingsql.tar.gz
bin/
bin/mysqlxtest
bin/mysql_tzinfo_to_sql

…………………………

执行安装指令,安装结束后会给出一个初始密码

[root@linux01 mysql]# /kingsql/database/mysql/bin/mysqld --initialize --user=mysql --datadir=/kingsql/database/mysql/data --basedir=/kingsql/database/mysql

修改my.cnf，添加以下内容
[root@ogg02 etc]# vi /etc/my.cnf
[client]
socket = /kingsql/database/mysql/tmp/mysql.sock

[mysqld_safe]
log-error=/kingsql/database/mysql/log/mysqld.log
pid-file=/kingsql/database/mysql/mysqld.pid

[mysqld]
basedir = /kingsql/database/mysql
datadir = /kingsql/database/mysql/data
port = 3306
socket = /kingsql/database/mysql/tmp/mysql.sock
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

将环境变量修改写入/etc/profile

[root@ogg02 etc]# echo "export PATH=$PATH:/kingsql/database/mysql/bin" >> /etc/profile

刷新/etc/profile
[root@ogg02 etc]# source /etc/profile

mysqld_safe脚本启动MySQL服务器后继续监控其运行情况

[root@ogg02 ~]# mysqld_safe&
[1] 2989
[root@ogg02 ~]# 2018-02-05T05:24:40.919162Z mysqld_safe Logging to '/kingsql/database/mysql/log/mysqld.log'.
2018-02-05T05:24:40.948708Z mysqld_safe Starting mysqld daemon with databases from /kingsql/database/mysql/data

# 获取临时密码 grep 'temporary password' /var/log/mysqld.log

# 使用临时密码登录 mysql -u root -p 

登录Mysql，密码为刚刚的初始密码

[root@ogg02 ~]# mysql -u root -p
Enter password:

# 修改root账户的密码
mysql> alter user 'root'@'localhost' identified by 'oracle';
Query OK, 0 rows affected (0.16 sec)

使用Mysql数据库

mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed

默认的账号的host属性都是localhost，意思是这个账号只能本地使用，如果要使用某个账号来远程登录，必须将账号的host属性值更改成%。
mysql> update user set host='%';
Query OK, 4 rows affected (0.11 sec)
Rows matched: 4 Changed: 4 Warnings: 0

刷新权限

mysql> flush privileges;

Query OK, 0 rows affected (0.02 sec)

mysql>
mysql> GRANT ALL ON *.* TO 'root'@'%'; #   *.*代表所有表的所有字段
Query OK, 0 rows affected (0.11 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.03 sec)

mysql>

修改密码认证方式为mysql_native_password
mysql> ALTER USER root IDENTIFIED WITH mysql_native_password BY 'oracle';

Query OK, 0 rows affected (0.11 sec)

mysql>

刷新权限
mysql> flush privileges;

Query OK, 0 rows affected (0.02 sec)