改用阿里云 16.04 归档源（推荐）

sudo tee /etc/apt/sources.list > /dev/null <<EOF
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
EOF

或者

sudo tee /etc/apt/sources.list > /dev/null <<EOF
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse
EOF

然后执行

sudo apt clean
sudo apt update

然后安装MySQL,默认就是5.7

sudo apt install mysql-server -y

安装后，修改密码

sudo mysql
ALTER USER 'root'@'localhost'
IDENTIFIED BY '你的新密码';
FLUSH PRIVILEGES;
exit

如果 ALTER USER 报错

SET PASSWORD FOR 'root'@'localhost' = PASSWORD('123456');
FLUSH PRIVILEGES;

 

测试密码

mysql -u root -p