1、官网下载mysql安装包
或者下边网盘下载
链接：https://pan.baidu.com/s/1exntLVS22kTzkDMl_dcIVA 提取码：6edy
mysql-server_5.7.29-1ubuntu18.04_amd64.deb-bundle.tar2、解压安装包
tar -xvf mysql-server_5.7.29-1ubuntu18.04_amd64.deb-bundle.tar3、安装mysql-common_5.7.29-1ubuntu18.04_amd64.deb 包
sudo dpkg -i mysql-common_5.7.29-1ubuntu18.04_amd64.deb安装mysql-community-server_5.7.29-1ubuntu18.04_amd64.deb 包
sudo dpkg -i mysql-community-server_5.7.29-1ubuntu18.04_amd64.deb上述安装报错：
上图报mysql-client和libmecab2未安装，按照提示，去安装mysql-client：
sudo dpkg -i mysql-client_5.7.29-1ubuntu18.04_amd64.deb报mysql-community-client未安装：
安装mysql-community-client：
sudo dpkg -i mysql-community-client_5.7.29-1ubuntu18.04_amd64.deb报libtinfo5未装：
安装libtinfo5---没有此包，官网下载，或者：
链接：https://pan.baidu.com/s/1ATTpZ5Px5DS2evIjkXH8vg 提取码：6pls
sudo dpkg -i libtinfo5_6.3-2_amd64.deb
然后倒推，安装mysql-community-client：
sudo dpkg -i mysql-community-client_5.7.29-1ubuntu18.04_amd64.deb
安装mysql-client：
sudo dpkg -i mysql-client_5.7.29-1ubuntu18.04_amd64.deb
安装libmecab2---官网下载，或者：
链接：https://pan.baidu.com/s/15lfiSRcoP5Oo8jBMswrB6w 提取码：9eao
安装libmecab2：
sudo dpkg -i libmecab2_0.996-14build9_amd64.deb
倒推，安装mysql-community-server_5.7.29-1ubuntu18.04_amd64.deb
sudo dpkg -i mysql-community-server_5.7.29-1ubuntu18.04_amd64.deb弹出窗口，提示输入设置mysql--root密码：
安装mysql-community-source_5.7.29-1ubuntu18.04_amd64.deb
sudo dpkg -i mysql-community-source_5.7.29-1ubuntu18.04_amd64.deb
安装mysql-community-server_5.7.29-1ubuntu18.04_amd64.deb
sudo dpkg -i mysql-community-server_5.7.29-1ubuntu18.04_amd64.deb
上述操作完，启动mysql
systemctl status mysql ##查看状态
systemctl start mysql ##启动
systemctl stop mysql ##停止登录测试：
mysql -uroot -p
登录成功，配置mysql开机自启动
systemctl stop mysql