首先要安裝服務端和客服端

sudo apt-get install mysql-server          //服務端
sudo apt-get install mysql-client          //客戶端

sudo netstat -tap | grep mysql
會顯示mysql服務的埠號和pid

mysql -u root -p 
如果忘了密碼就查詢預設密碼：
進入到etc/mysql 目錄下,檢視debian.cnf檔案

debian.cnf


# Automatically generated for Debian scripts. DO NOT TOUCH!
[client]
host     
 
= localhost
user     = debian-sys-maint
password = pASsYAUR2aRiaprZX
socket   = /var/run/mysqld/mysqld.sock
[mysql_upgrade]
host     = localhost
user     = debian-sys-maint
password = pASsYAUR2aRiaprZX
socket   = /var/run/mysqld/mysqld.sock

預設使用者登入　
mysql -u debian-sys-maint -p

修改root密碼　　　
mysql> use mysql;
mysql
 
> update user set authentication_string=password('1234qwer') where user='root' and Host ='localhost';
mysql> update user set plugin="mysql_native_password";
mysql> flush privileges;
mysql> quit;

登入密碼

mysql -uroot -p1234qwer

就可以正常登入資料庫了

參考文件

https://www.cnblogs.com/csig/p/12077928.html

https://www.cnblogs.com/lfri/p/10437694.html