sqlplus remote connection giving ORA-21561

Question

I have installed sqlplus based on instruction given here

sqlplus \'username/password@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.0.100)(PORT=1521))(         


        

Answer 1

Answer obtained here.

1 - Get your hostname:

$ hostname

new-host

2 - Change the contents of /etc/hosts:

$ sudo cat /etc/hosts

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain

::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

$ sudo nano /etc/hosts

$ sudo cat /etc/hosts

127.0.0.1 localhost new-host

::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

Hope this helps (: