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这里写目录标题

• 更改登录密码：
• • 有权限账号能登录mysql中：
  • 有权限账号不能登录mysql中：
  • • mysql5.6版本命令
    • mysql5.7版本命令
    • 修改密码8.0版本
    • 改完后：
• mysql登录不上了
• • • 本机安装了5.6后，又安装了mysql8.0

更改登录密码：

有权限账号能登录mysql中：

set password=password('redhat');    

有权限账号不能登录mysql中：

systemctl stop mariadb  #停止mysql
vim /etc/my.cnf   #更改配置文件

[mysqld]
skip-grant-tables

systemctl start mariadb

mysql -uroot

use mysql;

select Host,User,Password from mysql.user; 

grant all on *.* to root@localhost identified by '123456' with grant option; 

mysql5.6版本命令

update mysql.user set password=password('123456') where user='root';
flush privileges; #刷新
exit

mysql5.7版本命令

update user set authentication_string=password('123456') where user='root' and Host='localhost';
flush privileges; #刷新
exit

修改密码8.0版本

cat /var/log/mysqld.log | grep localhost  

alter user 'root'@'localhost' identified by 'mima';
flush privileges;
exit

改完后：

vim /etc/my.cnf

#skip-grant-tables  #注释 

systemctl restart mariadb 

mysql登录不上了

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

ps -ef | grep mysql

rm /var/run/mysqld/mysqld.sock
ln -s /tmp/mysql.sock /var/run/mysqld/mysqld.sock

service mysqld restart 

本机安装了5.6后，又安装了mysql8.0

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

dpkg -l | grep mysql
#ii  mysql-client-core-8.0                  8.0.37-0ubuntu0.22.04.3                 amd64        MySQL database core client binaries
apt-get remove mysql-client-core-8.0

systemctl  status mysql