Oracle issues, 10 questions per day (iv)

oracle| problem
How do I modify the editor under Sqlplus?　　DEFINE _editor= "< editor full path >"-you must add double quotes to define a new editor, or you can write this in $oracle_home/sqlplus/admin/glogin.sql to make it permanent.　　Oracle generates a random function? Dbms_random. RANDOM 33.　　Linux Query Disk competition status command? Sar-d 33.　　Linux Query CPU competition status command? Sar-r 34.　　Query the current user object?　　SELECT * from User_objects;　　SELECT * from Dba_segments;　　35. How do I get the error message?　　SELECT * from User_errors;　　36. How do I get link status? SELECT * from Dba_db_links;

37. View database character status?　　SELECT * from Nls_database_parameters;　　SELECT * from V$nls_parameters;　　38. Query table space information?　　SELECT * from Dba_data_files;　　Oracle's interal user wants a password? Modify Sqlnet. ORA sqlnet. Authentication_services= (NTS) 40.　　Is there a JAVA.EXE solution? The oracleorahomexihttpserver is usually changed to manual activation. x is 8 or 9