title: Unable to Grant session to a user
body: <p>I used yesterday the sqlplus on ubuntu 14.04LTS normally but today when I open it I connect to the System :</p>
  
  <pre><code>SQL&gt; connect system
  Enter Password : 
  Connected.
  </code></pre>
  
  <p>Then I want to connect to my account which I created yesterday :</p>
  
  <pre><code>SQL&gt; connect slim/slimhmidi;
  Connected.
  </code></pre>
  
  <p>when I want to create as session I had this error:</p>
  
  <pre><code>SQL&gt; grant session to slim;
  grant session to slim
        *
  ERROR at line 1:
  ORA-01919: role ' SESSION ' does not exist
  </code></pre>
  
  <p>I tried to create a session but no vain:</p>
  
  <pre><code>SQL&gt; grant create session to slim;
  grant create session to slim
  *
  ERROR at line 1: 
  ORA-01031: insufficient privileges
  </code></pre>
  
  <p>Also I have this error :</p>
  
  <pre><code>SQL&gt; grant connect to slim;
  grant connect to slim
        *
  </code></pre>
  
  <p>ERROR at line 1:
     ORA-01932: admin option not granted for role ' CONNECT'
  However I didn't have these problems yesterday.</p>