pi@raspberrypi:~ $  mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 38
Server version: 5.5.59-0+deb8u1 (Raspbian)

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Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql> SELECT user,host,password FROM mysql.user WHERE user='';
ERROR 1142 (42000): SELECT command denied to user 'root'@'localhost' for table 'user'
mysql>

mysql> status
--------------
mysql  Ver 14.14 Distrib 5.5.59, for debian-linux-gnu (armv7l) using readline 6.3

Connection id:      38
Current database:
Current user:       root@localhost
SSL:            Not in use
Current pager:      stdout
Using outfile:      ''
Using delimiter:    ;
Server version:     5.5.59-0+deb8u1 (Raspbian)
Protocol version:   10
Connection:     Localhost via UNIX socket
Server characterset:    latin1
Db     characterset:    latin1
Client characterset:    utf8
Conn.  characterset:    utf8
UNIX socket:        /var/run/mysqld/mysqld.sock
Uptime:         9 min 54 sec

Threads: 1  Questions: 121  Slow queries: 0  Opens: 48  Flush tables: 1  Open tables: 41  Queries per second avg: 0.203
--------------

mysql>

mysql> SHOW GRANTS;
+--------------------------------------------------------------------------+
| Grants for root@localhost                                                |
+--------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD <secret> |
+--------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql>