newbie wants to su



I just installed Linux for the first time. Ubuntu 14.10. It made at installation time an account which I named "beheer" ( which means administration ) with full rights. I set a password for this account. When I open a terminal and give the command su it asks for a password. I tried all the passwords I could think of including my own password but nothing worked. I tried "admin", "Admin", "NULL", "null" and an empty string. What did I do wrong? ( BTW, no worries: I intend to add an useraccount with reduced rights, for my daily stuff )

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