Ubuntu 18.04 安装mysql

首先要安装服务端和客服端

sudo apt-get install mysql-server          //服务端
sudo apt-get install mysql-client          //客户端

sudo netstat -tap | grep mysql
会显示mysql服务的端口号和pid

mysql -u root -p 
如果忘了密码就查询默认密码：
进入到etc/mysql 目录下,查看debian.cnf文件

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

默认用户登录　
mysql -u debian-sys-maint -p

修改root密码　　　
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;

登录密码

mysql -uroot -p1234qwer

就可以正常登录数据库了

参考文档

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

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