懶得設置格式了嗎，就這麼玩吧。
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid
rm -rf /usr/share/mysql
rm -rf /usr/local/mysql
rm -rf /usr/local/mysql/data/mysql
rm -rf /usr/local/mysql/include/mysql
rm -rf /usr/local/mysql/bin/mysql
rm -rf /usr/lib64/mysql
rm -rf /run/lock/subsys/mysql
rm -rf /home/mysql
rm -rf /etc/selinux/targeted/active/modules/100/mysql
rm -rf /var/spool/mail/mysql
rm -rf /var/lib/mysql
rm -rf /var/lib/mysql/mysql
rm -rf /root/mysql-5.7.28-linux-glibc2.12-x86_64/include/mysql
rm -rf /root/mysql-5.7.28-linux-glibc2.12-x86_64/bin/mysql
rm -rf /etc/my.cnf
//找個合適的地方下載mysql
wget -c https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz
//關閉mydql
service mysqld stop
//檢查是否有rpm包，如果沒有用rpm安裝過mysql，不應該有殘留，如果有，需要刪掉
rpm -qa|grep -i mysql //刪除語法: rpm -e <包的名字>
//通過find命令檢查是否有安裝mysql文件，有需要刪除
find / -name mysql
rm -rf /usr/local/mysql
rm -rf /home/mysql
rm -rf /var/spool/mail/mysql
//刪除mysql用戶
userdel -r -f mysql
//新建用戶
groupadd mysql
useradd -g mysql mysql
passwd mysql
//解壓文件，移動到/usr/local/mysql
tar -zxvf mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz
mv mysql-5.7.28-linux-glibc2.12-x86_64 /usr/local/mysql
//打開文件夾，創建data
cd /usr/local/mysql
mkdir data
//返回上一級，設置文件夾權限
cd …
chown -R mysql mysql/
chgrp -R mysql mysql/
//編輯配置文件
vim /etc/my.cnf
#內容是：（原來內容全部刪掉）
[client]
port = 3306
socket = /tmp/mysql.sock
[mysqld]
character_set_server=utf8
init_connect=‘SET NAMES utf8’
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
myisam-recover = BACKUP
#不區分大小寫
lower_case_table_names = 1
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
max_connections=5000
default-time_zone = ‘+8:00’
//準備初始化
#先安裝一下這個東東，要不然初始化有可能會報錯
yum install libaio
#手動編輯一下日誌文件，什麼也不用寫，直接保存退出
cd /var/log/
//創建並保存空的mysqld.log
vim mysqld.log
步驟insert->esc->:wq
//權限設置
chmod 777 mysqld.log
chown mysql:mysql mysqld.log
//初始化
/usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --lc_messages_dir=/usr/local/mysql/share --lc_messages=en_US --skip-grant-tables
//查看初始密碼
cat /var/log/mysqld.log
執行後關注最後一點：root@localhost: 這裏就是初始密碼
我的是;q)iisH11Wed
//開機
cd /var/run/
mkdir mysqld
chmod 777 mysqld
cd mysqld
vim mysqld.pid //創建後:wq!
chmod 777 mysqld.pid
chown mysql:mysql mysqld.pid
/usr/local/mysql/support-files/mysql.server start
/usr/local/mysql/bin/mysql -uroot -p 你在上面看到的初始密碼
//設置密碼.(貌似沒作用，直接用123456登錄)
set password=password(‘新密碼’);
flush privileges;//mysql 新設置用戶或更改密碼後需用flush privileges刷新MySQL的系統權限相關表
UPDATE mysql.user SET Host = ‘%’, User = ‘root’ WHERE (Host = ‘localhost’) AND (User = ‘root’);
//數據庫配置
use mysql;
UPDATE mysql.user SET Host=’%’, User=‘root’, Select_priv=‘Y’, Insert_priv=‘Y’, Update_priv=‘Y’, Delete_priv=‘Y’, Create_priv=‘Y’, Drop_priv=‘Y’, Reload_priv=‘Y’, Shutdown_priv=‘Y’, Process_priv=‘Y’, File_priv=‘Y’, Grant_priv=‘Y’, References_priv=‘Y’, Index_priv=‘Y’, Alter_priv=‘Y’, Show_db_priv=‘Y’, Super_priv=‘Y’, Create_tmp_table_priv=‘Y’, Lock_tables_priv=‘Y’, Execute_priv=‘Y’, Repl_slave_priv=‘Y’, Repl_client_priv=‘Y’, Create_view_priv=‘Y’, Show_view_priv=‘Y’, Create_routine_priv=‘Y’, Alter_routine_priv=‘Y’, Create_user_priv=‘Y’, Event_priv=‘Y’, Trigger_priv=‘Y’, Create_tablespace_priv=‘Y’, ssl_type=’’, ssl_cipher=’’, x509_issuer=’’, x509_subject=’’, max_questions=‘0’, max_updates=‘0’, max_connections=‘0’, max_user_connections=‘0’, plugin=‘mysql_native_password’, authentication_string=’*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9’, password_expired=‘N’, password_last_changed=‘2017-11-20 12:41:07’, password_lifetime=NULL, account_locked=‘N’ WHERE (User=‘root’);
flush privileges;
//右鍵複製新的ssh連接，或者ctrl+z
//開機自啓
cd /usr/local/mysql/support-files
cp mysql.server /etc/init.d/mysqld
chkconfig --add mysqld
//使用service mysqld命令啓動/停止服務
su - mysql
service mysqld start/stop/restart
/usr/local/mysql/bin/mysql -uroot -p
//輸密碼
遠程用戶建立
grant all privileges on . to ‘admin’@’%’ identified by ‘1234’;
flush privileges;
ln -s /usr/local/mysql/bin/mysql /usr/bin//相當於建立一個鏈接文件。-s進行軟鏈結。這樣mysql命令纔有用
//嘗試關閉、啓動、重啓、連接
service mysqld stop
service mysqld start
service mysqld restart
mysql -h 127.0.0.1 -P 3306 -u root -p 123456
mysql -h 127.0.0.1 -P 3306 -u admin -p 1234
//大功告成