先安裝JDK:
Linux安裝jdk(兩種方式)
我使用：
export JAVA_HOME=/myapp/jdk/jdk1.8.0_291
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
安裝mysql
參考：
Centos7安裝mysql8.0教程
sudo rpm -Uvh https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm
sudo yum --enablerepo=mysql80-community install mysql-community-server
sudo service mysqld start
【上面過程中一路y】
ALTER USER 'root'@'localhost' IDENTIFIED BY '新密碼';
在Linux上安裝MySQL
解決mysql8 提示 ERROR 1410 (42000): You are not allowed to create a user with GRANT
# 使用mysql 數據庫
mysql > use mysql;
# 特定用戶的host 修改
mysql > update user set host='%' where user='root';
# 指定用戶的授權
mysql > grant all privileges on test.* to root@'%'
flush privileges;
轉：
CentOS 8安裝Mysql8並設置開機自啟動
1, 看起來mysql又提供yum安裝了。
yum install mysql-server
先安裝wget
yum -y install wget
2,下載rpm安裝文件
wget http://repo.mysql.com/mysql-community-release-el7.rpm
3,執行rpm安裝
rpm -ivh mysql-community-release-el7.rpm
依賴解析完成后，出現下列選項：
1 Dependencies Resolved 2 3 ================================================================================================================================================================ 4 Package Arch Version Repository Size 5 ================================================================================================================================================================ 6 Installing: 7 mysql-community-libs x86_64 5.6.32-2.el7 mysql56-community 2.0 M 8 replacing mariadb-libs.x86_64 1:5.5.47-1.el7_2 9 mysql-community-server x86_64 5.6.32-2.el7 mysql56-community 59 M 10 Installing for dependencies: 11 mysql-community-client x86_64 5.6.32-2.el7 mysql56-community 19 M 12 mysql-community-common x86_64 5.6.32-2.el7 mysql56-community 256 k 13 perl-Compress-Raw-Bzip2 x86_64 2.061-3.el7 base 32 k 14 perl-Compress-Raw-Zlib x86_64 1:2.061-4.el7 base 57 k 15 perl-DBI x86_64 1.627-4.el7 base 802 k 16 perl-IO-Compress noarch 2.061-2.el7 base 260 k 17 perl-Net-Daemon noarch 0.48-5.el7 base 51 k 18 perl-PlRPC noarch 0.2020-14.el7 base 36 k 19 20 Transaction Summary 21 ================================================================================================================================================================ 22 Install 2 Packages (+8 Dependent packages) 23 24 Total download size: 82 M 25 Is this ok [y/d/N]: 4,可以看出，server和client都被選擇安裝。選擇y，自動下載安裝。
5,安裝完成后，啟動Mysql。
systemctl start mysqld.service
啟動
1、使用 service 啟動：service mysqld start
2、使用 mysqld 腳本啟動：/etc/inint.d/mysqld start
停止
1、使用 service 啟動：service mysqld stop
2、使用 mysqld 腳本啟動：/etc/inint.d/mysqld stop
重啟
1、使用 service 啟動：service mysqld restart
2、使用 mysqld 腳本啟動：/etc/inint.d/mysqld restart
登錄mysql：mysql -u root -p（開始密碼默認為空，直接回車）
6,設置密碼
use mysql
ALTER USER 'root'@'localhost' IDENTIFIED BY '密碼';
/update user set password=password("123456") where user='root';/
7,開機自啟動
systemctl enable mysqld
systemctl daemon-reload
8,重要更新
新的rpm安裝文件沒有自動yum安裝的腳本了，需要手動執行yum安裝。
即步驟3之后執行yum install mysql-server即可。
9，關於自啟動
步驟7只適用於mysqld沒有自啟動的條件下。
如果默認mysql是自啟動的，可能和rc.local中的自啟動出現亂序之類的問題。
更穩妥的一個解決辦法見：
CentOS 7 程序自啟動的問題
http://www.cnblogs.com/yoyotl/p/6194321.html
打開遠程訪問：
修改host為所有ip可登陸
update user set host='%' where user='root';
修改密碼
Alter user 'root'@'%' identified by '密碼';
授權
grant all privileges on *.* to 'root'@'%' with grant option;
FLUSH PRIVILEGES;
詳解查看：https://www.cnblogs.com/stronger-xsw/p/12785801.html
1：linux登錄mysql
[root@localhost mysql]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 19 Server version: 8.0.13 MySQL Community Server - GPL Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> 2：查看user表,修改連接級別
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 mysql> select host,user from user; +-----------+------------------+ | host | user | +-----------+------------------+ | localhost | root | | localhost | mysql.infoschema | | localhost | mysql.session | | localhost | mysql.sys | +-----------+------------------+ 4 rows in set (0.00 sec) 原文鏈接：https://blog.csdn.net/gdsgdh308227363/article/details/103308801
export JAVA_HOME=/myapp/jdk/jdk1.8.0_291
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar