title: Default username and password for SQL*Plus in Ubuntu 14.04?
body: <p>I followed the instructions mentioned to install SQL*Plus from <a href="https://help.ubuntu.com/community/Oracle%20Instant%20Client" rel="nofollow noreferrer">Oracle Instant Client</a> and <a href="https://askubuntu.com/questions/159939/how-to-install-sqlplus">How to Install SQLPlus</a>.</p>
  
  <p>SQL*Plus is successfully installed on my system but I cannot login and use it. There is a similar question <a href="https://askubuntu.com/questions/585520/how-to-run-sql-plus-in-ubuntu-14-04">here</a> and <a href="https://stackoverflow.com/questions/25741027/default-username-and-password-for-oracle-database">here</a>, but it is does not solve my problem.</p>
  
  <p>On googling, most sources said that we enter a password upon installation, but I was neither prompted nor displayed any password. (I can attach terminal screen shots if it is required)</p>
  
  <p>Is there any way I can login and start using SQL*Plus? Is there any default username or password?</p>
  
  <p>I am stuck here: <code>sqlplus username/password@//dbhost:1521/SID</code></p>
  
  <p>I need a valid username and password. <code>scott/tiger</code> was of no help.</p>
  
  <p><code>sqlplus / as sysdba</code> gives this -> <code>ERROR: ORA-12162: TNS:net service name is incorrectly specified</code> and prompts me to enter username and password which I don't have.</p>
  
  <p>I originally asked this question on <a href="https://askubuntu.com/questions/658070/default-username-and-password-for-sqlplus-in-ubuntu-14-04">AskUbuntu</a> feeling its more appropriate there. If this question does not belong here, please comment and I will remove it.</p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>I executed these statements after reading from <a href="http://www.dba-oracle.com/t_ora_12162_tns_net_service_name.htm" rel="nofollow noreferrer">here</a>:</p>
  
  <p><code>ORACLE_HOME=/u01/oracle; export ORACLE_HOME</code></p>
  
  <p><code>ORACLE_SID=asdb; export ORACLE_SID</code></p>
  
  <p>Now, On executing <code>sqlplus / as sysdba</code> I get the error message
  <code>ERROR: ORA-12545: Connect failed because target host or object does not exist</code></p>
  
  <p>On executing <code>sqlplus64 scott/tiger@//dbhost:1521/SID</code> I get the error message
  <code>ERROR: ORA-12154: TNS:could not resolve the connect identifier specified</code></p>