To get information about the currently connected user and more MySQL status information, you can call the following command if you are already logged in:

mysql> STATUS;

This will give you an output like that:

--------------
mysql  Ver 14.14 Distrib 5.1.73, for redhat-linux-gnu (x86_64) using readline 5.1

Connection id:		1044395
Current database:	
Current user:		niceguy@localhost
SSL:			Not in use
Current pager:		stdout
Using outfile:		''
Using delimiter:	;
Server version:		5.1.73-log Source distribution
Protocol version:	10
Connection:		Localhost via UNIX socket
Server characterset:	latin1
Db     characterset:	latin1
Client characterset:	latin1
Conn.  characterset:	latin1
UNIX socket:		/var/lib/mysql/mysql.sock
Uptime:			2 days 6 hours 26 min 44 sec

Threads: 8  Questions: 399680642  Slow queries: 20292  Opens: 9697  Flush tables: 1  Open tables: 4096  Queries per second avg: 2039.145
--------------

As you can see, you got a lot more information like operation system data, MysSQL version or the number of slow queries.