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MySql安装
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yum -y install libaio
wget
cd /usr/local/soft/mysql/src
mkdir ../5.7.24_3306 tar -xzvf mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz -C ../5.7.24_3306 --strip-components 1
mkdir -p /usr/local/soft/mysql/5.7.24_3306/{run,data,logs,bin_log,sock,cert}
groupadd mysql useradd -r -g mysql -s /bin/false mysql
cd /usr/local/soft/mysql/5.7.24_3306/bin ./mysqld --initialize
--explicit_defaults_for_timestamp
--user=mysql
--basedir=/usr/local/soft/mysql/5.7.24_3306
--datadir=/usr/local/soft/mysql/5.7.24_3306/data
--lc_messages_dir=/usr/local/soft/mysql/5.7.24_3306/share
--lc_messages=en_US
2018-12-01T09:56:45.934627Z 0 [Warning] InnoDB: New log files created, LSN=45790
2018-12-01T09:56:46.056837Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2018-12-01T09:56:46.127141Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 69d028f9-f54f-11e8-9c4a-00163e08e793.
2018-12-01T09:56:46.130249Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2018-12-01T09:56:46.131377Z 1 [Note] A temporary password is generated for root@localhost: sDdPx3.,oBi
cd /usr/local/soft/mysql/5.7.24_3306/bin ./mysql_ssl_rsa_setup --datadir=/usr/local/soft/mysql/5.7.24_3306/cert
修改证书权限为644
cd /usr/local/soft/mysql/5.7.24_3306/bin ./mysql -uroot -S /usr/local/soft/mysql/5.7.24_3306/sock/mysql.sock
use mysql;
update user set host = '%', authentication_string = password('123456') where user = 'root';
select host,user,authentication_string from user;
flush privileges;
grant all privileges on . to 'root'@'%';
flush privileges;
cat /etc/systemd/system/3306.service EOF
[Unit]
Description=MySQL 3306
Documentation=
After=network.target remote-fs.target nss-lookup.target
[Service]
Type=forking
PIDFile=/usr/local/soft/mysql/5.7.24_3306/run/mysql.pid
ExecStart=/usr/local/soft/mysql/5.7.24_3306/support-files/mysql.server start
ExecReload=/usr/local/soft/mysql/5.7.24_3306/support-files/mysql.server restart
ExecStop=/usr/local/soft/mysql/5.7.24_3306/support-files/mysql.server stop
PrivateTmp=true
[Install]
WantedBy=multi-user.target
EOF
systemctl enable 3306.service
1、
cd /usr/local/soft/mysql/5.7.24.3306/bin ./mysqld_safe --skip-grant-tables
cd /usr/local/soft/mysql/5.7.24.3306/bin ./mysqld_safe --skip-grant-tables --skip-networking
2、
./mysql -uroot -p -S /usr/local/soft/mysql/5.7.24.3306/sock/mysql.sock
3、
use mysql;
update mysql.user set authentication_string=password('123456') where user='root';
flush privileges;
mkdir -p /usr/local/soft/mysql/back/5.7.23_3306 cp -Rf /usr/local/soft/mysql/5.7.23_3306/* /usr/local/soft/mysql/back/5.7.23_3306
mkdir -p /usr/local/soft/mysql/back/5.7.24_3306 cp -Rf /usr/local/soft/mysql/5.7.24_3306/* /usr/local/soft/mysql/back/5.7.24_3306
CREATE USER 'sdyc'@'%' IDENTIFIED BY '123456';
GRANT SELECT, INSERT, UPDATE, DELETE, EXECUTE ON sd_data.* TO 'sdyc'@'%';
GRANT SELECT, INSERT, UPDATE, DELETE, EXECUTE ON card_data.* TO 'sdyc'@'%';
SHOW GRANTS FOR sdyc;
CREATE USER 'back'@'localhost' IDENTIFIED BY '123456';
GRANT SELECT, RELOAD, PROCESS, SHOW DATABASES, SUPER, LOCK TABLES, REPLICATION CLIENT ON . TO 'back'@'localhost'
SHOW GRANTS FOR back;
REVOKE SELECT, INSERT, UPDATE, DELETE, EXECUTE ON sd_data.* FROM 'sdyc'@'%';
mysqldinstallmysql。局部安装是在当前项目中建立包，在当前项目中起作用，mysql模块的命令是mysqldinstallmysql。模块是一个设计术语，是指对词条中部分内容进行格式化整理的模板。
1、在opt目录里面新建两个文件夹
（1）mySoftware：用于存放软件安装包
（2）mysql：安装mysql的文件夹
2、解压mysql安装包：tar -xvf mysql-8.0.26-1.el7.x86_64.rpm-bundle.tar -C /opt/mysql
3、进入mysql目录，依次执行下面命令：
4、启动MySQL服务
（1）systemctl start mysqld：启动mysql服务器
（2）systemctl restart mysqld：重启mysql服务器
（3）systemctl stop mysqld：停止mysql服务器
5、查询自动生成的root用户密码
6、修改root用户密码
登录到MySQL之后，需要将自动生成的不便记忆的密码修改了，修改成自己熟悉的便于记忆的密码。
ALTER USER 'root'@'localhost' IDENTIFIED BY '1234';
7、 默认的root用户只能当前节点localhost访问，是无法远程访问的，我们还需要创建一个root账户，用户远程访问
并给root用户分配权限
grant all on *.* to 'root'@'%';