二、 MySQL安装（tar.gz）
1.系统环境设置
1.1清空系统mysql
安装mysql之前需要将系统自带的mysql包进行删除：
yum remove all mysql\*
1.2SELinux设置
vim /etc/selinux/config
输入：
disabled
reboot
getenforce
df -lh （确保拥有4G空间可用）
1.3创建目录
1.3.1安装目录
mkdir -p /var/lib/mysql5.7/
1.3.2数据文件
mkdir -p /var/lib/mysql5.7/data mkdir -p /var/lib/mysql5.7/pid
1.3.3日志目录
mkdir -p /var/lib/mysql5.7/log
1.4设置时间同步
timedatectl set-timezone Asia/Shanghai date
2. 编译安装（tar.gz）
2.1赋权
chmod 755 mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz
2.2解压
tar -zxvf mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz -C /var/lib/mysql5.7/ cd /var/lib/mysql5.7/ ll 显示： total 0 drwxr-xr-x 4 root root 29 Dec 19 08:59 mysql5.7.28 drwxr-xr-x 9 root root 129 Dec 19 09:18 mysql-5.7.28-linux-glibc2.12-x86_64
2.3改名
mv mysql-5.7.28-linux-glibc2.12-x86_64/ mysql5.7.28 cd /var/lib/mysql5.7/mysql5.7.28
2.4创建用户与组、安装与配置
参照1：mysql官方文档
下载连接：https://downloads.mysql.com/docs/refman-5.7-en.pdf
[root@mysql_slave mysql5.7]# pwd /var/lib/mysql5.7 [root@mysql_slave mysql5.7]# cd mysql5.7.28 [root@mysql_slave mysql5.7.28]# groupadd mysql [root@mysql_slave mysql5.7.28]# useradd -r -g mysql -s /bin/false mysql [root@mysql_slave mysql5.7.28]# chown -R mysql:mysql /var/lib/mysql5.7/mysql5.7.28 [root@mysql_slave mysql5.7.28]# mkdir mysql-files [root@mysql_slave mysql5.7.28]# chown mysql:mysql mysql-files [root@mysql_slave mysql5.7.28]# chmod 750 mysql-files [root@mysql_slave mysql5.7.28]# bin/mysqld --initialize --user=mysql --basedir=/var/lib/mysql5.7/mysql5.7.28 --datadir=/var/lib/mysql5.7/data 2019-12-19T15:50:33.579346Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2019-12-19T15:50:33.867664Z 0 [Warning] InnoDB: New log files created, LSN=45790 2019-12-19T15:50:33.924879Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2019-12-19T15:50:33.984959Z 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: 4ad074ce-2277-11ea-aef8-000c2926368f. 2019-12-19T15:50:33.985896Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2019-12-19T15:50:34.459641Z 0 [Warning] CA certificate ca.pem is self signed. 2019-12-19T15:50:34.729030Z 1 [Note] A temporary password is generated for root@localhost: e_opE5TIU:we （临时密码） [root@mysql_slave mysql5.7.28]# echo $? （验证安装） 0 [root@mysql_slave mysql5.7.28]# vim /etc/my.cnf 修改两处： [mysqld] datadir=/var/lib/mysql5.7/data socket=/var/lib/mysql5.7/data/mysql.sock
2.5启动服务
[root@mysql_slave mysql5.7.28]# bin/mysql_ssl_rsa_setup [root@mysql_slave mysql5.7.28]# bin/mysqld_safe --user=mysql & [root@mysql_slave mysql5.7.28]# cp support-files/mysql.server /etc/init.d/mysql.server [root@mysql_slave mysql5.7.28]# service mysql.server start /etc/init.d/mysql.server: line 239: my_print_defaults: command not found /etc/init.d/mysql.server: line 259: cd: /usr/local/mysql: No such file or directory Starting MySQL ERROR! Couldn't find MySQL server (/usr/local/mysql/bin/mysqld_safe) 2.5.1依据报错提示，建立软连接： [root@mysql_slave mysql5.7.28]# cd /usr/local/ [root@mysql_slave local]# ln -s /var/lib/mysql5.7/mysql5.7.28 mysql （create a symbolic link to the installation directory created by tar） [root@mysql_slave local]# cd - /var/lib/mysql5.7/mysql5.7.28 [root@mysql_slave mysql5.7.28]# service mysql.server start Starting MySQL.2019-12-19T15:55:39.340393Z mysqld_safe error: log-error set to '/var/log/mariadb/mariadb.log', however file don't exists. Create writable for user 'mysql'. ERROR! The server quit without updating PID file (/var/lib/mysql/mysql_slave.pid). 2.5.2依据报错提示，设置日志目录： [root@mysql_slave mysql5.7]# pwd /var/lib/mysql5.7 [root@mysql_slave mysql5.7]# mkdir pid [root@mysql_slave mysql5.7]# touch /var/lib/mysql5.7/log/mysql.log [root@mysql_slave mysql5.7]# touch /var/lib/mysql5.7/pid/mysql.pid [root@mysql_slave mysql5.7]# chown -R mysql:mysql .* [root@mysql_slave mysql5.7]# vim /etc/my.cnf 修改两处： [mysqld_safe] #log-error=/var/log/mariadb/mariadb.log log-error=/var/lib/mysql5.7/log/mysql.log #pid-file=/var/run/mariadb/mariadb.pid pid-file=/var/lib/mysql5.7/pid/mysql.pid [root@mysql_slave mysql5.7.28]# service mysql.server start Starting MySQL SUCCESS! （看到这个是不是会有点高兴呢？）
2.6设置开机启动
chkconfig --add mysql.server chkconfig --list chkconfig mysql.server on systemctl start mysqld/mysql.server
2.7修改密码
[root@mysql_slave ~]# /var/lib/mysql5.7/mysql5.7.28/bin/mysqld_safe --skip-grant-tables & [root@mysql_slave mysql5.7.28]# mysql -uroot -p -bash: mysql: command not found 2.7.1根据报错提示设置环境变量 [root@mysql_slave mysql5.7.28]# export PATH=$PATH:/usr/local/mysql/bin [root@mysql_slave mysql5.7.28]# vim /etc/profile 输入： export PATH=$PATH:/usr/local/mysql/bin [root@mysql_slave mysql5.7.28]# source /etc/profil [root@mysql_slave mysql5.7.28]# mysql -uroot -p Enter password: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' 2.7.2根据报错提示，建立sock软连接 [root@mysql_slave ~]# find / -name mysql.sock /var/lib/mysql5.7/data/mysql.sock /var/lib/mysql/mysql.sock [root@mysql_slave ~]# rm -rf /tmp/* [root@mysql_slave ~]# ln -s /var/lib/mysql5.7/data/mysql.sock /tmp/mysql.sock 此时方可重置密码：设置密码 （右键点击打开超链接查阅更多方法） [root@mysql_slave ~]# /var/lib/mysql5.7/mysql5.7.28/bin/mysqld_safe --skip-grant-tables & 空密码登录： [root@mysql_slave ~]# mysql -uroot -p Enter password: （enter） Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 3 Server version: 5.7.28 MySQL Community Server (GPL) Copyright (c) 2000, 2019, 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. 首次修改密码必须使用alter： mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456'; 后面再次修改密码可以使用其他方法： mysql> update mysql.user set authentication_string=password('123456') where User='root'; mysql> flush privileges;
3.其它设置
3.1创建用户与数据库 （参考上一篇博文内容）
3.2授权访问 （参考上一篇博文内容）