一、所需环境
操作系统：Ubuntu 20.04
数据库：MySQL 5.7.34
网络情况：内网服务器，无法访问互联网资源
二、提前下载所需以来及安装包
1、所需依赖包
（1）libmecab2
http://archive.ubuntu.com/ubuntu/pool/universe/m/mecab/libmecab2_0.996-1.2ubuntu1_amd64.deb
（2）libaio1
http://archive.ubuntu.com/ubuntu/pool/main/liba/libaio/libaio1_0.3.110-2_amd64.deb
（3）libtinfo5
http://archive.ubuntu.com/ubuntu/pool/universe/n/ncurses/libtinfo5_6.2-0ubuntu2_amd64.deb
2、下载MySQL安装包
演示所用版本：
https://cdn.mysql.com/archives/mysql-5.7/mysql-server_5.7.34-1ubuntu18.04_amd64.deb-bundle.tar
大家可以去官网下载自己需要的版本：
https://downloads.mysql.com/archives/community/
三、安装依赖，以及安装MySQL
1、将下载的依赖以及安装包上传到自己指定的文件夹（演示用/opt）
2、安装依赖包
sudo dpkg -i libmecab2_0.996-1.2ubuntu1_amd64.deb
sudo dpkg -i libaio1_0.3.110-2_amd64.deb
sudo dpkg -i libtinfo5_6.2-0ubuntu2_amd64.deb
3、安装MySQL
（1）解压安装包
sudo tar -xvf mysql-server_5.7.34-1ubuntu18.04_amd64.deb-bundle.tar解压后目录如下：
（2）安装MySQL
sudo dpkg -i mysql-common_5.7.34-1ubuntu18.04_amd64.deb
sudo dpkg-preconfigure mysql-community-server_5.7.34-1ubuntu18.04_amd64.deb //此步需要输入数据的root密码
sudo dpkg -i libmysqlclient20_5.7.34-1ubuntu18.04_amd64.deb
sudo dpkg -i libmysqlclient-dev_5.7.34-1ubuntu18.04_amd64.deb
sudo dpkg -i libmysqld-dev_5.7.34-1ubuntu18.04_amd64.deb
sudo dpkg -i mysql-community-client_5.7.34-1ubuntu18.04_amd64.deb
sudo dpkg -i mysql-client_5.7.34-1ubuntu18.04_amd64.deb
sudo dpkg -i mysql-common_5.7.34-1ubuntu18.04_amd64.deb
sudo dpkg -i mysql-community-server_5.7.34-1ubuntu18.04_amd64.deb
sudo dpkg -i mysql-server_5.7.34-1ubuntu18.04_amd64.deb
（3）验证MySQL的安装是否成功：
mysql -u root -p //输入密码
查看mysql状态：
sudo systemctl status mysql.service
四、MySQL配置
1、开启MySQL远程访问
（1）修改mysqld.cnf配置文件
sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf
打开文件后将下面一行注释
#bind-address = 127.0.0.1（修改后）
（2）执行以下命令开启远程访问限制（注意：下面命令开启的IP是 192.168.0.1，如要开启所有的，用%代替IP）：
grant all privileges on *.* to 'root'@'192.168.0.1' identified by 'password' with grant option;然后再输入下面两行命令
flush privileges;
exit;2、防火墙开打开端口
1、查看防火墙状态，inactive是关闭，active是开启。
sudo ufw status
2、开启防火墙。
sudo ufw enable
3、关闭防火墙。
sudo ufw disable
4、开启3306端口访问
sudo ufw allow 3306/tcp
注意：UFW防火墙开发 3306端口，UFW处于 Status: inactive 时（sudo ufw status verbose），可以不执行上面操作命令
五、配置文件参考
# Copyright (c) 2014, 2021, Oracle and/or its affiliates.
# ......
# ......
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
log-error = /var/log/mysql/error.log
default_storage_engine = InnoDB
performance_schema_max_table_instances = 400
table_definition_cache = 400
skip-external-locking
key_buffer_size = 1024M
max_allowed_packet = 100G
table_open_cache = 4096
sort_buffer_size = 16M
net_buffer_length = 4K
read_buffer_size = 16M
read_rnd_buffer_size = 256K
myisam_sort_buffer_size = 256M
thread_cache_size = 512
query_cache_size = 512M
tmp_table_size = 512M
sql-mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
explicit_defaults_for_timestamp = true
skip-name-resolve
max_connections = 500
max_connect_errors = 100
open_files_limit = 65535
log-bin=mysql-bin
binlog_format=mixed
server-id = 1
expire_logs_days = 10
#slow_query_log=1
long_query_time=3
#log_queries_not_using_indexes=on
early-plugin-load = ""
innodb_data_home_dir = /var/lib/mysql
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /var/lib/mysql
innodb_buffer_pool_size = 4096M
innodb_log_file_size = 2048M
innodb_log_buffer_size = 512M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50
innodb_max_dirty_pages_pct = 90
innodb_read_io_threads = 40
innodb_write_io_threads = 40
[mysqldump]
quick
max_allowed_packet = 500M
[mysql]
no-auto-rehash
[myisamchk]
key_buffer_size = 1024M
sort_buffer_size = 16M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout
# By default we only accept connections from localhost
# bind-address = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0