[root@localhost ~]# systemctl stop mysqld [root@localhost ~]# systemctl set-environment MYSQLD_OPTS="--skip-grant-tables" [root@localhost ~]# systemctl start mysqld [root@localhost ~]# mysql -u root mysql> UPDATE mysql.user SET authentication_string = PASSWORD('내가하고싶은비밀번호') -> WHERE User = 'root' AND Host = 'localhost'; mysql> FLUSH PRIVILEGES; mysql> quit [root@localhost ~]# systemctl stop mysq..