How to truncate audit tablespace ?

How to truncate audit tablespace ?

select sum(bytes)/(1024*1024) "Table size(MB)" from dba_segments where segment_name='AUD$' and owner='SYS';

select count(*) from sys.aud$;

select owner,segment_name,segment_type,tablespace_name,bytes/1024/1024 "MB Size" from dba_segments where segment_name='AUD$';

TRUNCATE table sys.AUD$;

select count(*) from sys.aud$;