title: sqlplus: command not found on Ubuntu
body: <p>I just installed Oracle Database 11g R2 on Ubuntu.</p>
  
  <p>I tried to run <code>sqlplus</code> but I got this message :</p>
  
  <pre><code>sqlplus: command not found
  </code></pre>
  
  <p>These are the values of : $ORACLE_SID, $ORACLE_HOME and $PATH</p>
  
  <pre><code>aimad@localhost:/u01/app/oracle/product/11.2.0/dbhome_2/bin$ echo $ORACLE_SID
  
  aimad@localhost:/u01/app/oracle/product/11.2.0/dbhome_2/bin$ echo $ORACLE_HOME
  /u01/app/oracle/product/11.2.0/dbhome_2/
  aimad@localhost:/u01/app/oracle/product/11.2.0/dbhome_2/bin$ echo $PATH
  /usr/local/sbin:/sbin:/usr/sbin:/bin:/usr/bin:/usr/bin/X11:/usr/local/bin:/usr/bin:/usr/X11R6/bin:/root/bin
  </code></pre>
  
  <p>How can I solve this problem ?</p>