重新启动mysql

liu@liu-virtual-machine:~$ ps aux|grep mysqld
mysql      5252  0.2  4.5 1496516 181200 ?      Sl   11:01   0:01 /usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid
liu        5366  0.0  0.0  16184  1076 pts/0    S+   11:12   0:00 grep --color=auto mysqld
liu@liu-virtual-machine:~$ sudo service mysql restart
liu@liu-virtual-machine:~$ 

查看mysql是否运行以及重新启动mysql

进入mysql

liu@liu-virtual-machine:~$ mysql -uroot -p
Enter password: 

设置权限以及重新加载权限表; 更新权限;

ymysql>  GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root'   WITH GRANT OPTION;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)