LIBNAME statement
In my session, I would define the SAS data library by the following statement.

LIBNAME LIBRARY '/bios524/classlib';

LIBNAME statement (global) LIBNAME libref 'pathname'; The quoted string points to an already defined directory location under the UNIX operating system. Note: You may use any valid SAS name for libref, but there are good reasons to use LIBRARY (we will get to these reasons later).