第一步：

cd /opt
cd soft
wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

或者下载到本地然后使用工具上传至服务器。新建目录存放 eg. /root/opt/soft

第三步：

cd /opt
mkdir data
mkdir data/mysql
cd soft
 tar -zxvf mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz#解压缩
 mv mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz #改名字

groupadd mysql #创建mysql用户组
useradd -r -g mysql mysql #创建mysql用户

#关联myql用户到mysql用户组中
chown -R mysql:mysql  /opt/soft/mysql/
chown -R mysql:mysql  /opt/data/mysql/
chown -R mysql  /opt/soft/mysql/
chown -R mysql  /opt/data/mysql

chmod -R 755 /opt/soft/mysql/

cd /opt/soft/mysql/bin

./mysqld --user=mysql --basedir=/opt/soft/mysql --datadir=/opt/data/mysql --initialize

特别注意，执行最后一句后，会出现。localhost：后面就是临时密码

[Note] A temporary password is generated for root@localhost: <y F:qXiX0NC

第四步：修改mysql配置文件

vi /opt/soft/mysql/support-files/mysql.server

i #移到对应位置  添加以下代码
basedir=/opt/soft/mysql
datadir=/opt/data/mysql
#按esc :wq 保存退出

第五步：

cp /opt/soft/mysql/support-files/mysql.server  /etc/init.d/mysqld
chmod 755 /etc/init.d/mysqld

vi /etc/my.cnf

修改为:

[client]
no-beep
socket =/opt/soft/mysql/mysql.sock
# pipe
# socket=0.0
port=3306
[mysql]
default-character-set=utf8
[mysqld]
basedir=/opt/soft/mysql
datadir=/opt/data/mysql
port=3306
pid-file=/opt/soft/mysql/mysqld.pid
#skip-grant-tables
skip-name-resolve
socket = /opt/soft/mysql/mysql.sock
character-set-server=utf8
default-storage-engine=INNODB
explicit_defaults_for_timestamp = true
# Server Id.
server-id=1
max_connections=2000
query_cache_size=0
table_open_cache=2000
tmp_table_size=246M
thread_cache_size=300
#限定用于每个数据库线程的栈大小。默认设置足以满足大多数应用
thread_stack = 192k
key_buffer_size=512M
read_buffer_size=4M
read_rnd_buffer_size=32M
innodb_data_home_dir = /opt/data/mysql
innodb_flush_log_at_trx_commit=0
innodb_log_buffer_size=16M
innodb_buffer_pool_size=256M
innodb_log_file_size=128M
innodb_thread_concurrency=128
innodb_autoextend_increment=1000
innodb_buffer_pool_instances=8
innodb_concurrency_tickets=5000
innodb_old_blocks_time=1000
innodb_open_files=300
innodb_stats_on_metadata=0
innodb_file_per_table=1
innodb_checksum_algorithm=0
back_log=80
flush_time=0
join_buffer_size=128M
max_allowed_packet=1024M
max_connect_errors=2000
open_files_limit=4161
query_cache_type=0
sort_buffer_size=32M
table_definition_cache=1400
binlog_row_event_max_size=8K
sync_master_info=10000
sync_relay_log=10000
sync_relay_log_info=10000
#批量插入数据缓存大小，可以有效提高插入效率，默认为8M
bulk_insert_buffer_size = 64M
interactive_timeout = 604800 #7*24小时
wait_timeout = 604800 #7*24小时
log-bin-trust-function-creators=1
event_scheduler=1 #开启定时任务
sql_mode=ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION
#
# include all files from the config directory
#
!includedir /etc/my.cnf.d

第六步：

/etc/init.d/mysqld start

第七步：添加mysql目录

vi ~/.bash_profile 

增加以下一行

PATH=$PATH:/opt/soft/mysql/bin

保存关闭

source ~/.bash_profile 

第八步：进入mysql

mysql -u root -p

提示输入密码

输入之前的临时密码

第九步：修改mysql密码

1、 set password=password('xxx');
flush privileges;

如果使用客户端连接出现问题，则再使用以下

2、 update user set authentication_string=password('xxx') where user='root' and host='%'; 
flush privileges;

添加远程访问

show databases; #查看当前的数据库
use mysql;#使用mysql数据库
show tables;#查看当前的数据表
select * from user;#查看当前用户
insert into user(Host, User, authentication_string, ssl_cipher, x509_issuer, x509_subject,
                 Select_priv, Insert_priv, Update_priv, Delete_priv, Create_priv, Drop_priv, Reload_priv, Shutdown_priv,
                 Process_priv, File_priv, Grant_priv, References_priv, Index_priv, Alter_priv, Show_db_priv, Super_priv,
                 Create_tmp_table_priv, Lock_tables_priv, Execute_priv, Repl_slave_priv, Repl_client_priv,
                 Create_view_priv, Show_view_priv, Create_routine_priv, Alter_routine_priv, Create_user_priv,
                 Event_priv, Trigger_priv, Create_tablespace_priv) value ('%', 'root', password('root'), '', '',
                                                                          '', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y',
                                                                          'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y',
                                                                          'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y',
                                                                          'Y', 'Y', 'Y');
flush privileges;

第十步：配置阿里云安全规则和解析

端口3306
授权对象：0.0.0.0/0


将备案的域名进行解析
1.选择：将域名指向一个IPV4地址
2.主机记录随意填
3.记录值：填写xxxxxxx申请的ip

测试。完成。。。。。。

如果出现问题请参考

https://www.jianshu.com/p/1293f0706343

其他命令

删除文件
rm -rf /run/lock/subsys/mysql

查找是素有mysql文件
find / -name mysql 

如果出现问题：

useradd - r -g mysql mysql