Nid oes gennych ganiatâd i ddefnyddio 'su'! Ar rai gysawdau, mae angen i chi fod mewn grŵp arbennig (yn aml: olwyn (wheel)) i ddefnyddio' r raglen yma.
You are not allowed to use'su '; on some systems, you need to be in a special group (often: wheel) to use this program.