Hello @kartik,
If you're already logged into the command line client try this:
mysql> select user();
It will output something similar to this:
| user() |
| root@localhost |
1 row in set (0.41 sec)
In my example above, I was logged in as root from localhost.
To find port number and other interesting settings use this command:
mysql> show variables;
Hope it helps!!
Thank you!